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Engineering › Aerospace Engineering

Antenna Design and Analysis

Works Count: 130641

Description

This cluster of papers covers advancements in antenna design and applications, including topics such as microstrip antennas, MIMO systems, wireless communications, fractal antennas, wideband antennas, reconfigurable antennas, metamaterial-based antennas, ultrawideband technology, and techniques for reducing mutual coupling between antenna elements.

Keywords

Antenna; Microstrip; MIMO; Wireless Communications; Fractal; Wideband; Reconfigurable; Metamaterial; Ultrawideband; Mutual Coupling

Modern Antenna Handbook

2007-11-26
Constantine A. Balanis
Find the most up-to-date and comprehensive treatment of classical and modern antennas and their related technologies in Modern Antenna Handbook. Have access to current theories and practices in the field … Find the most up-to-date and comprehensive treatment of classical and modern antennas and their related technologies in Modern Antenna Handbook. Have access to current theories and practices in the field of antennas, with topics like metamaterials, microelectromechanical systems (MEMS), frequency selective surfaces (FSS), radar cross sections (RCS), and advanced numerical and computational methods targeted primarily for the analysis and design of antennas. Written by leading international experts, this book will help you understand recent developments in antenna-related technology and the future direction of this fast-paced field.

Handbook of Antennas in Wireless Communications

2001-08-16
Lal C. Godara
From the Publisher: The move toward worldwide wireless communications continues at a remarkable pace, and the antenna element of the technology is crucial to its success. With contributions from more … From the Publisher: The move toward worldwide wireless communications continues at a remarkable pace, and the antenna element of the technology is crucial to its success. With contributions from more than 30 international experts, the Handbook of Antennas in Wireless Communications brings together all of the latest research and results to provide engineering professionals and students with a one-stop reference on the theory, technologies, and applications for indoor, hand-held, mobile, and satellite systems.Beginning with an introduction to wireless communications systems, it offers an in-depth treatment of propagation prediction and fading channels. It then explores antenna technology with discussion of antenna design methods and the various antennas in current use or development for base stations, hand held devices, satellite communications, and shaping beams. The discussions then move to smart antennas and phased array technology, including details on array theory and beamforming techniques. Space diversity, direction-of-arrival estimation, source tracking, and blind source separation methods are addressed, as are the implementation of smart antennas and the results of field trials of systems using smart antennas implemented. Finally, the hot media topic of the safety of mobile phones receives due attention, including details of how the human body interacts with the electromagnetic fields of these devices.Its logical development and extensive range of diagrams, figures, and photographs make this handbook easy to follow and provide a clear understanding of design techniques and the performance of finished products. Its unique, comprehensive coverage written by top experts in their fields promises tomake the Handbook of Antennas in Wireless Communications the standard reference for the field.

Microstrip antennas : the analysis and design of microstrip antennas and arrays

1995-01-01
David M. Pozar , D.H. Schaubert , Ieee Antennas
Microstrip antennas: the analysis and design of microstrip antennas and arrays , Microstrip antennas: the analysis and design of microstrip antennas and arrays , مرکز فناوری اطلاعات و اطلاع رسانی … Microstrip antennas: the analysis and design of microstrip antennas and arrays , Microstrip antennas: the analysis and design of microstrip antennas and arrays , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی

Handbook of microstrip antennas

1989-01-01
James R. James , P.S. Hall
Analysis and design of circular microstrip elements microstrip patch antennas circular polarization and bandwidth electromagnetically coupled dipoles multilayer configurations large bandwidth hybrid flat dipoles and arrays numerical analysis of microstrip … Analysis and design of circular microstrip elements microstrip patch antennas circular polarization and bandwidth electromagnetically coupled dipoles multilayer configurations large bandwidth hybrid flat dipoles and arrays numerical analysis of microstrip patch antennas segmentation and desegmentation methods for microstrip antenna design transmission line model of microstrip antennas design and technology of low cost printed antennas analysis and design considerations of printed array antennas circularly polarized array antennas microstrip antenna feeds advances in substrate technology special measurement techniques for printed antennas CAD of microstrip and triplate systems resonant microstrip antenna elements and arrays applications of microstrip antennas monolithic conical conformal microstrip tracking antenna extensions and variations of the microstrip antenna concept.

Microstrip Antenna Theory and Design

1981-01-01
J.R. James , P.S. Hall , C. Wood
This book brings a blend of introductory, practical and theoretical treatments and likely future developments are also highlighted. A good selection of past and current references are given and each … This book brings a blend of introductory, practical and theoretical treatments and likely future developments are also highlighted. A good selection of past and current references are given and each chapter concludes with a helpful summary comment.

Channels, Propagation and Antennas for Mobile Communications

2003-01-01
Rodney G. Vaughan , Jørgen Bach-Anderson
This exceptional book introduces the reader to the principles, theory and applications of physical layer wireless/mobile communications. applicators and millimetric antennas. The book emphasises the basic principles needed to establish … This exceptional book introduces the reader to the principles, theory and applications of physical layer wireless/mobile communications. applicators and millimetric antennas. The book emphasises the basic principles needed to establish an understanding of this technology, whilst treating the tools required - such as the mathematics and statistics - in the manner of a practical handbook, thus avoiding detailed derivations.

Antenna theory, analysis, and design

1982-01-01
W. Croswell

Antenna Theory and Design

1982-01-01
A.W. Rudge

Dielectric resonator antennas—a review and general design relations for resonant frequency and bandwidth

1994-07-01
R.K. Mongia , P. Bhartia
Abstract Open dielectric resonators (DRs) offer attractive features as antenna elements. These include their small size, mechanical simplicity, high radiation efficiency due to no inherent conductor loss, relatively large bandwidth, … Abstract Open dielectric resonators (DRs) offer attractive features as antenna elements. These include their small size, mechanical simplicity, high radiation efficiency due to no inherent conductor loss, relatively large bandwidth, simple coupling schemes to nearly all commonly used transmission lines, and the advantage of obtaining different radiation characteristics using different modes of the resonator. In this article, we give a comprehensive review of the modes and the radiation characteristics of DRs of different shapes, such as cylindrical, cylindrical ring, spherical, and rectangular. Further, accurate closed form expressions are derived for the resonant frequencies, radiation Q‐factors, and the inside fields of a cylindrical DR. These design expressions are valid over a wide range of DR parameters. Finally, the techniques used to feed DR antennas are discussed. © 1994 John Wiley & Sons, Inc.

Antennas: Theory and Practice

1953-01-01
S. A. Schelkunoff , Harald T. Friis , V. Twersky

Antenna theory; analysis and design

1984-07-01
Rajeev Bansal

Microstrip antenna aperture-coupled to a microstripline

1985-01-01
D.M. Pozar
A new technique for feeding printed antennas is described. A microstrip antenna on one substrate is coupled to a microstripline feed on another parallel substrate through an aperture in the … A new technique for feeding printed antennas is described. A microstrip antenna on one substrate is coupled to a microstripline feed on another parallel substrate through an aperture in the ground plane which separates the two substrates. A simple theory explaining the coupling mechanism is presented, as well as measurements of a prototype aperture-fed antenna.

Fractal antennas: a novel antenna miniaturization technique, and applications

2002-01-01
J.P. Gianvittorio , Yahya Rahmat‐Samii
Fractal geometry involves a recursive generating methodology that results in contours with infinitely intricate fine structures. This geometry, which has been used to model complex objects found in nature such … Fractal geometry involves a recursive generating methodology that results in contours with infinitely intricate fine structures. This geometry, which has been used to model complex objects found in nature such as clouds and coastlines, has space-filling properties that can be utilized to miniaturize antennas. These contours are able to add more electrical length in less volume. In this article, we look at miniaturizing wire and patch antennas using fractals. Fractals are profoundly intricate shapes that are easy to define. It is seen that even though the mathematical foundations call for an infinitely complex structure, the complexity that is not discernible for the particular application can be truncated. For antennas, this means that we can reap the rewards of miniaturizing an antenna using fractals without paying the price of having to manufacture an infinitely complex radiator. In fact, it is shown that the required number of generating iterations, each of which adds a layer of intricacy, is only a few. A primer on the mathematical bases of fractal geometry is also given, focusing especially on the mathematical properties that apply to the analysis of antennas. Also presented is an application of these miniaturized antennas to phased arrays. It is shown how these fractal antennas can be used in tightly packed linear arrays, resulting in phased arrays that can scan to wider angles while avoiding grating lobes.

Fundamental Limitations of Small Antennas

1947-12-01
H.A. Wheeler
A capacitor or inductor operating as a small antenna is theoretically capable of intercepting a certain amount of power, independent of its size, on the assumption of tuning without circuit … A capacitor or inductor operating as a small antenna is theoretically capable of intercepting a certain amount of power, independent of its size, on the assumption of tuning without circuit loss. The practical efficiency relative to this ideal is limited by the "radiation power factor" of the antenna as compared with the power factor and bandwidth of the antenna tuning. The radiation power factor of either kind of antenna is somewhat greater than (1/6π) (Ab/l <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> ) in which Ab is the cylindrical volume occupied by the antenna, and l is the radianlength (defined as 1/2π wavelength) at the operating frequency. The efficiency is further limited by the closeness of coupling of the antenna with its tuner. Other simple formulas are given for the more fundamental properties of small antennas and their behavior in a simple circuit. Examples for 1-Mc. operation in typical circuits indicate a loss of about 35 db for the I.R.E. standard capacitive antenna, 43 db for a large loop occupying a volume of 1 meter square by 0.5 meter axial length, and 64 db for a loop of 1/5 these dimensions.

Exact representation of antenna system diversity performance from input parameter description

2003-05-01
S. Blanch , J. Romeu , I. Corbella
A simple formulation to compute the envelope correlation of an antenna diversity system is derived. It is shown how to compute the envelope correlation from the S-parameter description of the … A simple formulation to compute the envelope correlation of an antenna diversity system is derived. It is shown how to compute the envelope correlation from the S-parameter description of the antenna system. This approach has the advantage that it does not require the computation nor the measurement of the radiation pattern of the antenna system. It also offers the advantage of providing a clear understanding of the effects of mutual coupling and input match on the diversity performance of the antenna system.
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Theoretical limitations on the broadband matching of arbitrary impedances

1950-02-01
R.M. Fano
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The resonant cylindrical dielectric cavity antenna

1983-05-01
Stuart A. Long , M. McAllister , Liang Shen
An experimental investigation of the radiation and circuit properties of a resonant cylindrical dielectric cavity antenna has been undertaken. The radiation patterns and input impedance have been measured for structures … An experimental investigation of the radiation and circuit properties of a resonant cylindrical dielectric cavity antenna has been undertaken. The radiation patterns and input impedance have been measured for structures of various geometrical aspect ratios, dielectric constants, and sizes of coaxial feed probes. A simple theory utilizing the magnetic wall boundary condition is shown to correlate well with measured results for radiation patterns and resonant frequencies.

A re-examination of the fundamental limits on the radiation Q of electrically small antennas

1996-05-01
James McLean
An exact method, which is more straightforward than those previously published, is derived for the calculation of the minimum radiation Q of a general antenna. This expression agrees with the … An exact method, which is more straightforward than those previously published, is derived for the calculation of the minimum radiation Q of a general antenna. This expression agrees with the previously published and widely cited approximate expression in the extreme lower limit of electrical size. However, for the upper end of the range of electrical size which is considered electrically small, the exact expression given here is significantly different from the approximate expression. This result has implications on both the bandwidth and efficiency limitations of antennas which fall into this category.

Handbook of Microstrip Antennas

1990-01-01
Matt Withers

Overview of spatial channel models for antenna array communication systems

1998-01-01
R.B. Ertel , Paulo Cardieri , K.W. Sowerby +2 more
Spatial antenna diversity has been important in improving the radio link between wireless users. Historically, microscopic antenna diversity has been used to reduce the fading seen by a radio receiver, … Spatial antenna diversity has been important in improving the radio link between wireless users. Historically, microscopic antenna diversity has been used to reduce the fading seen by a radio receiver, whereas macroscopic diversity provides multiple listening posts to ensure that mobile communication links remain intact over a wide geographic area. In later years, the concepts of spatial diversity have been expanded to build foundations for emerging technologies, such as smart (adaptive) antennas and position location systems. Smart antennas hold great promise for increasing the capacity of wireless communications because they radiate and receive energy only in the intended directions, thereby greatly reducing interference. To properly design, analyze, and implement smart antennas and to exploit spatial processing in emerging wireless systems, accurate radio channel models that incorporate spatial characteristics are necessary. In this tutorial, we review the key concepts in spatial channel modeling and present emerging approaches. We also review the research issues in developing and using spatial channel models for adaptive antennas.

An overview of fractal antenna engineering research

2003-02-01
D.H. Wqrner , Swaroop Ganguly
Recent efforts by several researchers around the world to combine fractal geometry with electromagnetic theory have led to a plethora of new and innovative antenna designs. In this report, we … Recent efforts by several researchers around the world to combine fractal geometry with electromagnetic theory have led to a plethora of new and innovative antenna designs. In this report, we provide a comprehensive overview of recent developments in the rapidly growing field of fractal antenna engineering. Fractal antenna engineering research has been primarily focused in two areas: the first deals with the analysis and design of fractal antenna elements, and the second concerns the application of fractal concepts to the design of antenna arrays. Fractals have no characteristic size, and are generally composed of many copies of themselves at different scales. These unique properties of fractals have been exploited in order to develop a new class of antenna-element designs that are multi-band and/or compact in size. On the other hand, fractal arrays are a subset of thinned arrays, and have been shown to possess several highly desirable properties, including multi-band performance, low sidelobe levels, and the ability to develop rapid beamforming algorithms based on the recursive nature of fractals. Fractal elements and arrays are also ideal candidates for use in reconfigurable systems. Finally, we provide a brief summary of recent work in the related area of fractal frequency-selective surfaces.

Single-layer single-patch wideband microstrip antenna

1995-08-03
Tan‐Phat Huynh , K.-F. Lee
A coaxially-fed single-layer single-patch wideband microstrip antenna in the form of a rectangular patch with a U-shaped slot is discussed. Measurements showed that this antenna can attain 10–40% impedance bandwidth … A coaxially-fed single-layer single-patch wideband microstrip antenna in the form of a rectangular patch with a U-shaped slot is discussed. Measurements showed that this antenna can attain 10–40% impedance bandwidth without the need of adding parasitic patches in another layer or in the same layer.

Wide-band E-shaped patch antennas for wireless communications

2001-07-01
Fan Yang , Xuexia Zhang , Xiaoning Ye +1 more
This paper presents a novel single-patch wide-band microstrip antenna: the E-shaped patch antenna. Two parallel slots are incorporated into the patch of a microstrip antenna to expand it bandwidth. The … This paper presents a novel single-patch wide-band microstrip antenna: the E-shaped patch antenna. Two parallel slots are incorporated into the patch of a microstrip antenna to expand it bandwidth. The wide-band mechanism is explored by investigating the behavior of the currents on the patch. The slot length, width, and position are optimized to achieve a wide bandwidth. The validity of the design concept is demonstrated by two examples with 21.2% and 32.3% bandwidths. Finally, a 30.3% E-shaped patch antenna, resonating at wireless communication frequencies of 1.9 and 2.4 GHz, is designed, fabricated and measured. The radiation pattern and directivity are also presented.

Wide-band planar monopole antennas

1998-01-01
N.P. Agrawall , Girish Kumar , K. P. Ray
The circular disc monopole (CDM) antenna has been reported to yield wide-impedance bandwidth. Experiments have been carried out on a CDM that has twice the diameter of the reported disc … The circular disc monopole (CDM) antenna has been reported to yield wide-impedance bandwidth. Experiments have been carried out on a CDM that has twice the diameter of the reported disc with similar results. New configurations are proposed such as elliptical (with different ellipticity ratios), square, rectangular, and hexagonal disc monopole antennas. A simple formula is proposed to predict the frequency corresponding to the lower edge of the bandwidth for each of these configurations. The elliptical disc monopole (EDM) with ellipticity ratio of 1.1 yields the maximum bandwidth from 1.21 GHz to more than 13 GHz for voltage standing wave ratio (VSWR)<2.

Microstrip antenna technology

1981-01-01
K. Carver , J.W. Mink
A survey of microstrip antenna elements is presented, with emphasis on theoretical and practical design techniques. Available substrate materials are reviewed along with the relation between dielectric constant tolerance and … A survey of microstrip antenna elements is presented, with emphasis on theoretical and practical design techniques. Available substrate materials are reviewed along with the relation between dielectric constant tolerance and resonant frequency of microstrip patches. Several theoretical analysis techniques are summarized, including transmission-line and modal-expansion (cavity) techniques as well as numerical methods such as the method of moments and finite-element techniques. Practical procedures are given for both standard rectangular and circular patches, as well as variations on those designs including circularly polarized microstrip patches. The quality, bandwidth, and efficiency factors of typical patch designs are discussed. Microstrip dipole and conformal antennas are summarized. Finally, critical needs for further research and development for this antenna are identified.

A Review of Antennas and Propagation for MIMO Wireless Communications

2004-11-01
Michael A. Jensen , Jon W. Wallace
Multiple-input-multiple-output (MIMO) wireless systems use multiple antenna elements at transmit and receive to offer improved capacity over single antenna topologies in multipath channels. In such systems, the antenna properties as … Multiple-input-multiple-output (MIMO) wireless systems use multiple antenna elements at transmit and receive to offer improved capacity over single antenna topologies in multipath channels. In such systems, the antenna properties as well as the multipath channel characteristics play a key role in determining communication performance. This paper reviews recent research findings concerning antennas and propagation in MIMO systems. Issues considered include channel capacity computation, channel measurement and modeling approaches, and the impact of antenna element properties and array configuration on system performance. Throughout the discussion, outstanding research questions in these areas are highlighted.
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Study of a printed circular disc monopole antenna for UWB systems

2005-11-01
Jianxin Liang , C.C. Chiau , Xiaodong Chen +1 more
This paper presents a study of a novel monopole antenna for ultrawide-band (UWB) applications. Printed on a dielectric substrate and fed by a 50 /spl Omega/ microstrip line, a planar … This paper presents a study of a novel monopole antenna for ultrawide-band (UWB) applications. Printed on a dielectric substrate and fed by a 50 /spl Omega/ microstrip line, a planar circular disc monopole has been demonstrated to provide an ultra wide 10 dB return loss bandwidth with satisfactory radiation properties. The parameters which affect the performance of the antenna in terms of its frequency domain characteristics are investigated. A good agreement is achieved between the simulation and the experiment. In addition, the time domain performance of the proposed antenna is also evaluated in simulations.

Antenna diversity in mobile communications

1987-11-01
Rodney G. Vaughan , Jørgen Bach Andersen
The conditions for antenna diversity action are investigated. In terms of the fields, a condition is shown to be that the incident field and the far field of the diversity … The conditions for antenna diversity action are investigated. In terms of the fields, a condition is shown to be that the incident field and the far field of the diversity antenna should obey (or nearly obey) an orthogonality relationship. The role of mutual coupling is central, and it is different from that in a conventional array antenna. In terms of antenna parameters, a sufficient condition for diversity action for a certain class of high gain antennas at the mobile, which approximates most practical mobile antennas, is shown to be zero (or low) mutual resistance between elements. This is not the case at the base station, where the condition is necessary only. The mutual resistance condition offers a powerful design tool, and examples of new mobile diversity antennas are discussed along with some existing designs.

A Statistical Theory of Mobile-Radio Reception

1968-07-08
R. H. Clarke
The statistical characteristics of the fields and signals in the reception of radio frequencies by a moving vehicle are deduced from a scattering propagation model. The model assumes that the … The statistical characteristics of the fields and signals in the reception of radio frequencies by a moving vehicle are deduced from a scattering propagation model. The model assumes that the field incident on the receiver antenna is composed of randomly phased azimuthal plane waves of arbitrary azimuth angles. Amplitude and phase distributions and spatial correlations of fields and signals are deduced, and a simple direct relationship is established between the signal amplitude spectrum and the product of the incident plane waves' angular distribution and the azimuthal antenna gain. The coherence of two mobile-radio signals of different frequencies is shown to depend on the statistical distribution of the relative time delays in the arrival of the component waves, and the coherent bandwidth is shown to be the inverse of the spread in time delays. Wherever possible theoretical predictions are compared with the experimental results. There is sufficient agreement to indicate the validity of the approach. Agreement improves if allowance is made for the nonstationary character of mobile-radio signals.

Theoretical and experimental investigations on rectangular dielectric resonator antennas

1997-01-01
R.K. Mongia , A. Ittipiboon
Theoretical and experimental investigations on rectangular dielectric resonator antennas having a value of /spl epsiv//sub r/, in the range of 10 to 100 are reported. The resonant frequencies and radiation … Theoretical and experimental investigations on rectangular dielectric resonator antennas having a value of /spl epsiv//sub r/, in the range of 10 to 100 are reported. The resonant frequencies and radiation Q-factors of the lowest order "magnetic-dipole" modes are derived on the basis of a first-order theory. The accuracy of the model in predicting the resonant frequency and radiation Q-factor is verified by comparison with results of a rigorous theory and experiments. Various feeds for the antennas such as probe, microstrip slot, and microstrip line are described. Measured radiation patterns are shown and the effect of feed and mode degeneracy on the cross-polarisation levels is discussed.

Multibeam Antenna Technologies for 5G Wireless Communications

2017-06-07
Wei Hong , Zhi Hao Jiang , Chao Yu +7 more
With the demanding system requirements for the fifth-generation (5G) wireless communications and the severe spectrum shortage at conventional cellular frequencies, multibeam antenna systems operating in the millimeter-wave frequency bands have … With the demanding system requirements for the fifth-generation (5G) wireless communications and the severe spectrum shortage at conventional cellular frequencies, multibeam antenna systems operating in the millimeter-wave frequency bands have attracted a lot of research interest and have been actively investigated. They represent the key antenna technology for supporting a high data transmission rate, an improved signal-to-interference-plus-noise ratio, an increased spectral and energy efficiency, and versatile beam shaping, thereby holding a great promise in serving as the critical infrastructure for enabling beamforming and massive multiple-input multiple-output (MIMO) that boost the 5G. This paper provides an overview of the existing multibeam antenna technologies which include the passive multibeam antennas (MBAs) based on quasi-optical components and beamforming circuits, multibeam phased-array antennas enabled by various phase-shifting methods, and digital MBAs with different system architectures. Specifically, their principles of operation, design, and implementation, as well as a number of illustrative application examples are reviewed. Finally, the suitability of these MBAs for the future 5G massive MIMO wireless systems as well as the associated challenges is discussed.

The Theory of Linear Antennas

1956-12-31
Ronold W. P. King

Microstrip antennas

1992-01-01
D.M. Pozar
Microstrip antennas have been one of the most innovative topics in antenna theory and design in recent years, and are increasingly finding application in a wide range of modern microwave … Microstrip antennas have been one of the most innovative topics in antenna theory and design in recent years, and are increasingly finding application in a wide range of modern microwave systems. This paper begins with a brief overview of the basic characteristics of microstrip antennas, and then concentrates on the most significant developments in microstrip antenna technology that have been made in the last several years. Emphasis is on new antenna configurations for improved electrical performance and manufacturability and on advances in the analytical modeling of microstrip antennas and arrays.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Broadband microstrip antennas

2019-10-14
Girish Kumar , K. P. Ray
Microstrip antennas are inherently narrow band. The typical bandwidth of a microstrip antenna is around 4%-7%. A considerable number of experimental approaches have been undertaken to develop microstrip antennas which … Microstrip antennas are inherently narrow band. The typical bandwidth of a microstrip antenna is around 4%-7%. A considerable number of experimental approaches have been undertaken to develop microstrip antennas which have a broader impedance bandwidth than a single microstrip element achieves without external matching. The methods employed to increase impedance bandwidth are essentially variations of three approaches: (a) Increasing the antenna volume. This is accomplished by geometry changes which increase the volume under the patch (e.g. increasing the thickness h), decreasing the substrate dielectric constant, or adding additional coupled resonators. (b) The implementation of a matching network. (c) Perturbing the antenna geometry to create or relocate resonances using shorts and slots in the antenna. Kumar and Ray (2003) have compiled a considerable number of microstrip antenna design variations which utilize these approaches, as has Wong (2002). One approach is the use of a groundplane slot, which is excited by a microstrip line below the groundplane, which in turn couples to a microstrip patch which is above the groundplane. This configuration can be adjusted to produce an elegant matching network, low dielectric constant substrate for the patch, and maximized substrate thickness, which provides a broadband input impedance match, and a large impedance bandwidth. One implementation of this type of antenna is called SSFIP for Strip-Slot-Foam-Inverted Patch by Zürcher and Gardiol in the mid-1990s. The design of these antennas is experimental in nature. These researchers state: "Since the various parts of the antenna interact, determining the best design is a long and tedious process, even when carried out systematically." The parameters which may be used to guide this type of design are found in the literature. Some possible alternatives to the SSFIP matching-network/thick patch design are explored in this Chapter.

Serpent-Configured Quad-Port MIMO Antenna with Dual-Band Operation and Defected Substrate-Ground Structure for Millimeter-Wave Systems

2025-06-25
Bhaskara Rao Perli , Tathababu Addepalli , G. Divya +4 more | Journal of Infrared Millimeter and Terahertz Waves

Modeling of a Circular Disk Monopole Antenna Fed from a Microwave Broadband Coplanar Waveguide

2025-06-24
| Deleted Journal

Planar Inverted F-Antenna Miniaturized with Capacitive Loading using Vertical Wall

2025-06-24
Satyajit Chakrabarti , Satyajit Chakrabarti , Aritra Banerjee | IETE Journal of Research

kifmm-rs: A Kernel-Independent Fast Multipole Framework in Rust

2025-06-24
Srinath Kailasa | The Journal of Open Source Software

A High Gain Switched Beamforming Antenna Array with Hemispherical Lens for Ka-Band 5G Applications

2025-06-24
Emna Jebabli , Mohamed Hayouni , Fethi Choubani | Journal of Infrared Millimeter and Terahertz Waves

A Trident-Fed Wine Glass UWB Antenna Based on Bézier Curve Optimization

2025-06-24
Canh Ly , Jae‐Young Chung | Electronics
This work introduces a wine glass-shaped planar ultra-wideband (UWB) antenna. The antenna achieves a compact form factor by reducing lateral width through Bézier curve shaping and a trident feed, while … This work introduces a wine glass-shaped planar ultra-wideband (UWB) antenna. The antenna achieves a compact form factor by reducing lateral width through Bézier curve shaping and a trident feed, while maintaining length for low-frequency operation. The wine-glass-shaped radiator increases shunt capacitance and enhances midband impedance matching, as demonstrated by equivalent circuit analysis, while the trident feed improves matching at higher frequencies. This design yields a 92% fractional bandwidth (3.2–8.7 GHz) within a compact volume of 0.37λ0×0.13λ0×0.0013λ0. The prototype is fabricated on two 50-μm-thick polyimide flexible copper-clad laminates (FCCL), and its performance is evaluated in an anechoic chamber. The measured results demonstrate omnidirectional radiation with an efficiency of over 80% across the UWB band. With broad operational range and compactness, the antenna is well-suited for IoT and wearable sensing applications.

Near Zero Index Metamaterial for Gain Enhancement of Multiband Patch Antenna

2025-06-23
Mohammad Tariqul Islam , Md Samsuzzaman | CRC Press eBooks

Metamaterial for Planar Antenna

2025-06-23
Mohammad Tariqul Islam | CRC Press eBooks

Isolation Enhancement of Wideband MIMO Antenna Using T-structured Metamaterial Shield

2025-06-23
Md. Mhedi Hasan , Mohammad Tariqul Islam | CRC Press eBooks

Varactor-tuned 4 × 4 MIMO antenna with reconfigurable 2.38–5.1 GHz band and fixed 7.2–20 GHz wideband for sub-6 GHz, X-band, and Ku-band wireless systems

2025-06-23
Tülün Durukan , Yasemin Altuncu | Journal of Electromagnetic Waves and Applications

Design and Simulation of Compact Array Antenna for mm Wave Wireless Biomedical Systems

2025-06-23
Arun Raj , Durbadal Mandal | Deleted Journal

Application of negative Poisson’s ratio metamaterials in medical field: a comprehensive review

2025-06-23
Kexin Chen , Linzhi Wu , Guangyue Wang +3 more | Functional Composites and Structures
Abstract Negative Poisson's ratio (NPR) materials represent a distinctive class of mechanical metamaterials, characterized by their capacity to expand or contract in the transverse directions upon being subjected to uniaxial … Abstract Negative Poisson's ratio (NPR) materials represent a distinctive class of mechanical metamaterials, characterized by their capacity to expand or contract in the transverse directions upon being subjected to uniaxial tensile or compressive forces. The excellent mechanical properties, such as energy absorption capacity, auxeticity, synclastic anisotropy, fatigue and indentation resistance, give them great potential in the medical field.Due to this mechanical property of NPR materials, it becomes ideal for interaction with human organ tissues and it is widely used in the biomedical field with an increasing number of publications in recent years. Therefore, focusing on understanding the potential of this material and promoting theoretical studies on the advantages of its unique mechanical properties is necessary to realize high-performance biomedical applications. This review focuses on the application progress of NPR materials in medicine. Herein, an exhaustive search in the authoritative databases PubMed and Web of Science was performed utilizing keywords such as NPR and auxetic. In addition, patents were searched on Google Patent to summarize the medical application of NPR materials more comprehensively. The medical application scenarios of NPR materials are then analyzed in terms of their properties. As a conclusion, NPR materials have become indispensable new materials in the medical field due to their unique mechanical properties, such as in orthopedic implantable devices, in vascular stents, and in myocardial tissues. Notably, NPR materials will provide the feasibility of new ideas and case studies for the further development of medical technology. However, further research is needed into production costs and cycle times, structural innovation, and intelligent integration to address the increasing medical demands of the new era.

On-demand high gain and directional surface wave antenna with 100° field of view based on grounded dielectric metasurface

2025-06-23
Ke Pang , Yongjun Xie , Weikang Si +2 more | Applied Physics Letters
We present a surface wave antenna based on a grounded dielectric metasurface-integrated Luneburg lens. This innovative design achieves a compact footprint, superior efficiency, and cost-effectiveness relative to traditional phased array … We present a surface wave antenna based on a grounded dielectric metasurface-integrated Luneburg lens. This innovative design achieves a compact footprint, superior efficiency, and cost-effectiveness relative to traditional phased array antennas. The metasurface unit cells are optimized through an efficient approach to determine their effective refractive index. We leveraged the quasi-conformal transformation optics technique to transform the conventional Luneburg lens into a planar configuration. This planar configuration facilitates beam steering via a sliding feed mechanism or makes it compatible with multi-feed setups. A prototype operating in the Ku-band (14–18 GHz) demonstrates effective performance, delivering a peak gain of 16.5 dBi and a wide 100° field of view. Furthermore, simulations of a terahertz (THz)-band version underscore the versatility of this design methodology across frequency regimes. The grounded dielectric metasurface architecture minimizes Ohmic losses, positioning this Luneburg lens antenna as a promising candidate for high-performance applications in elevated frequency bands.

Metamaterial Based Beam Tilting for mm Wave Antenna Applications

2025-06-23
Mohammad Lutful Hakim , Mohammad Tariqul Islam , Touhidul Alam | CRC Press eBooks

Miniaturization Mechanism of Planar Antenna using Metamaterial Structure

2025-06-23
Mohammad Tariqul Islam , Md Mushfiqur Rahman , Md. Shabiul Islam | CRC Press eBooks

Bandwidth, Gain and Isolation Enhancement of Miniaturized MIMO Antenna Using Metamaterials

2025-06-23
Mohammad Tariqul Islam , Md. Mhedi Hasan | CRC Press eBooks

Machine Learning-Driven Metamaterial Absorber for RCS Reduction in the Terahertz Range Antenna Optimization Perspective

2025-06-23
Prince Jain , Mohammad Tariqul Islam | CRC Press eBooks

An advanced miniaturization approach for designing compact rectangular microwave patch antennas with metamaterial substrates

2025-06-20
Oleg Rybin , Muhammad Ali Raza , Anatolii Shevchenko +1 more | Journal of Computational Electronics

High isolation quad ports MIMO antenna loaded with FSS for 5G communication

2025-06-20
S. M. Gaber , Radwa A. Kareem , Ahmed A. Ibrahim | Scientific Reports
Abstract This paper introduces a high isolation quad ports MIMO (Multiple-Input Multiple-Output) antenna with a frequency selective surface (FSS) structure for higher frequency bands in 5G communication systems. The recommended … Abstract This paper introduces a high isolation quad ports MIMO (Multiple-Input Multiple-Output) antenna with a frequency selective surface (FSS) structure for higher frequency bands in 5G communication systems. The recommended antenna is designed for 28 GHz application. The single unit of the antenna consists of a microstrip feed line on one side and a rectangular slot in the ground plane on the other side. The four MIMO antennas are arranged orthogonally on a Rogers RO4003C substrate with a permittivity of 3.38, a loss tangent (tan δ) of 0.002, and a height of 0.203 mm. The substrate features a cross-shaped cut to enhance the isolation between ports. An FSS is placed beneath the MIMO system to improve the overall gain across the desired frequency band. The antenna size is 25.7 × 25.7 mm². The design and simulation of the proposed structure were carried out using CST MW Studio. The antenna with and without the FSS structure was constructed and tested to verify the simulation results. The results indicate that the suggested structure is worked from 25.5 GHz up to 30 GHz with insertion loss ≤ -22 dB and peak gain of around 8dBi. As well, the envelope correlation coefficient (ECC), diversity gain (DG), and channel capacity loss (CCL) are measured and achieved ≤ 0.002, ≥ 9.99 dB, ≤ 0.2 bit/s/Hz, respectively. Also, extra MIMO parameters such as mean effective gain (MEG), channel capacity, and total active reflection coefficient (TARC) are extracted and achieve good outcomes confirming the ability of the antenna to be applicable for 5G networks.

Compact 4-Port MIMO Antenna-Diplexer Utilizing Slotted-HMSIW Technology

2025-06-20
Divya Chaturvedi , Tiruganesh Lanka , Arvind Kumar | IEEE Latin America Transactions

A high-performance dual-element slotted THz antenna with enhanced MIMO metrics for 5G/6G applications

2025-06-20
K. C. Rajarajeshwari , N. Saravanakumar | Wireless Networks

A Printed Hybrid-Mode Antenna for Dual-Band Circular Polarization with Flexible Frequency Ratio

2025-06-20
Takafumi Fujimoto , Chai‐Eu Guan | Electronics
In this paper, a printed hybrid-mode antenna for dual-band circular polarization (CP) is proposed. In the proposed antenna, one T-shaped element is fed by a coplanar waveguide and one L-shaped … In this paper, a printed hybrid-mode antenna for dual-band circular polarization (CP) is proposed. In the proposed antenna, one T-shaped element is fed by a coplanar waveguide and one L-shaped element is loaded to the ground plane. The relationship between the antenna’s geometric parameters and the circular polarization characteristic (axial ratio) is examined through electric current distribution and radiation field components. In addition, the antenna’s resonant modes are investigated through characteristic mode analysis (CMA). Through parametric studies, the range of two frequency ratios is explored, revealing that the antenna operates as a dual-band single-sense CP antenna, even in ranges where the two frequency ratios (the ratio of high frequency to low frequency) are smaller compared to antennas in other studies. The proposed antenna has a frequency ratio of less than 1.5 between the two frequencies and can be flexibly designed. The proposed antenna is designed for the 2.5 GHz band and 3.5 GHz band. The measured bandwidths of 10 dB impedance with a 3 dB axial ratio are 2.35–2.52 GHz and 3.36–3.71 GHz, respectively.

Flexible Wearable Spiral Antenna Applied to Narrowband Internet of Things Range

2025-06-19
Paulo Fernandes da Silva , Luys Arthur Serejo Alves , Ewaldo Éder Carvalho Santana +7 more | Research Square (Research Square)
<title>Abstract</title> This work proposes the development of a flexible wearable spiral printed circuit board antenna, shaped like the letter P, for use in the narrowband Internet of Things, which can … <title>Abstract</title> This work proposes the development of a flexible wearable spiral printed circuit board antenna, shaped like the letter P, for use in the narrowband Internet of Things, which can be used to capture electromagnetic energy, operating in the 880 MHz band. The antenna is designed and built in polyamide laminate, a flexible dielectric, consisting of three 0.5 mm thick transmission lines, separated by a distance of 1 mm, connected to a transmission line, and a ground plane in the same plane as the antenna, with impedance matching promoted by the distance between the ends of the lines and the antenna structure. The use of the three transmission lines, and the distance of and twice the transmission line promote stability in the main parameters of the antenna. From the results it was observed that the printed circuit board spiral wearable P-shape antenna obtained an omnidirectional radiation pattern, resonance frequency measured at 877 MHz, measured narrowband, with bandwidth of 20 MHz, half-power beam width of 108º, maximum gain of 5.5 dBi and current density of 6.93 A/m<sup>2</sup>, and compact structure, 5.47 cm<sup>2</sup>, with characteristics for use in capturing electromagnetic energy from incident waves from distant radiators or nearby circuits.

Compact Frequency-Agile and Mode-Reconfigurable Antenna for C-Band, Sub-6-GHz-5G, and ISM Applications

2025-06-19
Esraa Mousa Ali , Wahaj Abbas Awan , Anees Abbas +2 more | Micromachines
This article presents the design and evaluation of a compact-sized antenna targeting heterogenous applications working in the C-band, 5G-sub-6GHz, and the ISM band. The antenna offers frequency reconfigurability along with … This article presents the design and evaluation of a compact-sized antenna targeting heterogenous applications working in the C-band, 5G-sub-6GHz, and the ISM band. The antenna offers frequency reconfigurability along with multi-operational modes ranging from wideband to dual-band and tri-band. A compact-sized antenna is designed initially to cover a broad bandwidth that ranges from 4 GHz to 7 GHz. Afterwards, various multiband antennas are formed by loading various stubs. Finally, the wideband antenna along with multi-stub loaded antennas are combined to form a single antenna. Furthermore, PIN diodes are loaded between the main radiator and stubs to activate the stubs on demand, which consequently generates various operational modes. The last stage of the design is optimization, which helps in achieving the desired bandwidths. The optimized antenna works in the wideband mode covering the C-band, Wi-Fi 6E, and the ISM band. Meanwhile, the multiband modes offer the additional coverage of the LTE, LTE 4G, ISM lower band, and GSM band. The various performance parameters are studied and compared with measured results to show the performance stability of the proposed reconfigurable antenna. In addition, an in-depth literature review along with comparison with proposed antenna is performed to show its potential for targeted applications. The utilization of FR4 as a substrate of the antenna along with its compact size of 15 mm × 20 mm while having multiband and multi-mode frequency reconfigurability makes it a strong candidate for present as well as for future smart devices and electronics.

Wideband Frequency Independent Four Arm Sinuous Antenna for Satellite Communication

2025-06-19
R. Shantha Selva Kumari , V. Guruarchana | Transactions on Electrical and Electronic Materials

Design and Development of Novel Nut-shaped SRR unit cell and analysis of DNG property

2025-06-19
R. Panicker , S. Sellakutti | Advanced Electromagnetics
This paper presents design and development of a novel Nut-shaped Metamaterial Split Ring Resonator as a unit cell. Metamaterials with negative permittivity and permeability play a crucial role in improving … This paper presents design and development of a novel Nut-shaped Metamaterial Split Ring Resonator as a unit cell. Metamaterials with negative permittivity and permeability play a crucial role in improving the antenna performance. The unit cell comprises of two Split Ring Resonator with a thin transmission line connecting them. This structure measures a size 12 mm x 12 mm on the FR4 substrate of 16 mm x 16 mm x 1.6 mm. The shape of the unit cell developed in this work has been evolved using nature-inspired fractal geometries on a FR4 substrate. The simulation in the frequency range 2-4 GHz and the retrieval of negative medium properties have been carried out using HFSS 18.2 and MATLAB respectively. The fabrication and experimental verification have also been performed. Using the transmission〖 S〗_21 and reflection S_11 properties the double negative medium properties have been studied using both the Nicholson-Ross-Weir as well as the Transmission-Reflection methods. Comparison of simulation and experimental results of both the methods exhibit the existence of negative medium properties of the unit cell within the selected frequency range. The proposed unit cell exhibits the Effective medium ratio value of 8.16 and 7.45 at 3.06 GHz and 3.35 GHz. This type of DNG SRR unit cell is recommended for Electromagnetic Energy harvesting applications.

A novel compact 4 x 4 Multi-slot MIMO antenna for N78/79, Wi-Fi 5/6, and V2X/DSRC for 5G in Sub-6 GHz band

2025-06-19
P. Pradeep , K. Jaya Sankar , Chandra Sekhar Paidimarry | Advanced Electromagnetics
In this article, a novel multi-slot 2-port and 4-port compact wideband MIMO antennas are designed for 5G communication in the sub-6 GHz band. The multi-slot antenna contains a rectangular patch … In this article, a novel multi-slot 2-port and 4-port compact wideband MIMO antennas are designed for 5G communication in the sub-6 GHz band. The multi-slot antenna contains a rectangular patch with two square cuts at the lower corner of it. Here, two rectangular slots, one at the top edge and the other near the bottom edge of the antenna. The orthogonal placement technique helps to provide initial isolation between ports. Further, a P-shaped stub is added to the top edge of the antenna element to achieve very high isolation among 4 antennas. The FR4 substrate’s overall dimensions are considered 56 x 56 x 1.6 mm3. The proposed 4-port multi-slot antenna achieved isolation of &gt; 15 dB in the operating frequency band from 3.60 GHz – 7.33 GHz. The 4-port multi-slot prototype results and its simulated results are almost similar. The radiation patterns in elevation and azimuth planes are stable, a peak gain and high efficiency are 5.2 dB and 95% respectively. This antenna performance can be envisaged for N78/79, Wi-Fi 5/6, and Vehicle2X/DSRC bands.

Design of low-profile broadband circularly polarized flat-top metasurface antenna

2025-06-19
H. Li , Rui Zhang , Tian Lu +3 more | Journal of Physics D Applied Physics
Abstract In this paper, a low-profile broadband circularly polarized flat-top metasurface antenna is proposed. The array patch forms a diamond-shaped metasurface structure. It is fed by the stepped rotated microstrip … Abstract In this paper, a low-profile broadband circularly polarized flat-top metasurface antenna is proposed. The array patch forms a diamond-shaped metasurface structure. It is fed by the stepped rotated microstrip line at the bottom through the slot of the ground plane. The design of the stepped rotated microstrip line does not require additional layers to achieve circular polarization as reported in other literature, and it cooperates with the metasurface to obtain good impedance bandwidth and axial ratio bandwidth, making the design simpler and easier to manufacture. The final design has an overall size of 1.76×1.76×0.07λ0 at 5GHz. The simulation results compare well with the measured results. The maximum gain of the left-hand circular polarization gain is 8.5dBic, the impedance bandwidth is 4.3-6GHz (33%), the 3dB axial ratio bandwidth is 4.6-5.6GHz (20%), the flat-top bandwidth is 4.6-5.6GHz (20%). The 3dB flat-top beam bandwidth in the xoz plane and yoz plane of 4.6-5.0GHz is stable greater than 90° and 91°, and the 3dB flat-top beam bandwidth in 5.1-5.6GHz is stable greater than 72° and 68°. Compared with other works, this antenna has the advantages of broadband circular polarization, low profile, and wide beam.The stable flat-top radiation pattern makes it more popular in the field of microwave power transmission.

Design and Performance Analysis of a Dual Band Patch Antenna and its MIMO Implementation for Wi-Fi, Radar, and V2X Applications

2025-06-19
Pushpendra P. Singh , Sudhir Kumar Sharma , Narbada Prasad Gupta | Advanced Electromagnetics
A dual-band 2-port Multiple Input Multiple Output (MIMO) antenna is designed and analyzed in this paper. The designed antenna resonates at two frequencies, 4.54 GHz and 5.8 GHz, with bandwidths … A dual-band 2-port Multiple Input Multiple Output (MIMO) antenna is designed and analyzed in this paper. The designed antenna resonates at two frequencies, 4.54 GHz and 5.8 GHz, with bandwidths of 340 and 360 MHz for each band, respectively. A low-cost FR-4 substrate with a dielectric constant of 4.4 and a thickness of 1.6 mm is used to simulate and fabricate the antenna. Total dimension of a single antenna element is 17 mm×22 mm×1.6 mm (0.25λ×0.32λ×0.024λ), and the MIMO configuration measures 45 mm×22 mm×1.6 mm (0.66λ×0.32λ×0.024λ) at 3.6 GHz. The fundamental parameters of MIMO antenna like isolation (&gt;20dB), ECC (&lt;0.00012), DG (~10), MEG (-3dB), CCL (&lt;0.2 bps/Hz) and TARC (&lt;0.3) and radiation parameters are evaluated which prove the practicality of the antenna for Wi-Fi (5.725-5.85 GHz), 5G applications in Japan (4.4-4.5 GHz), radar (civilian and military), amateur radio communications (5.65-5.925 GHz), and Vehicle-to-Everything (V2X) (5.85-5.925 GHz) communication systems. Also, the designed antenna demonstrates radiation efficiency of more than 69% across first operating band and more than 76% across second operating frequency. The designed antenna can also be used in remote sensing applications to study various environmental parameters at 4.54 GHz, as electromagnetic waves at this frequency penetrate easily and provide data on soil moisture, vegetation, etc.

Design a compact square-ring antenna using a thin film of HTS materials

2025-06-19
Mohamed Bedra , Sami Bedra , D. Arar +3 more | Journal of Computational Electronics

Design and Realization of a Multi-Band, High-Gain, and High-Isolation MIMO Antenna for 5G mmWave Communications

2025-06-18
Nabeel Alsaab , Mahmoud Shaban | Applied Sciences
This research introduces a novel, high-performance multiple-input–multiple-output (MIMO) antenna designed to operate in allocated millimeter-wave (mmWave) 5G wireless communications. Operating in the tri-band, 28, 35, and 38 GHz, the four-port … This research introduces a novel, high-performance multiple-input–multiple-output (MIMO) antenna designed to operate in allocated millimeter-wave (mmWave) 5G wireless communications. Operating in the tri-band, 28, 35, and 38 GHz, the four-port MIMO antenna possesses a compact size—measuring just 50 × 50 × 0.787 mm3 (4.67λo × 4.67λo × 0.73λo). The antenna delivers a remarkable performance, achieving peak gains of 9.6, 7.8, and 13.7 dBi in the tri-band, respectively. The realized bandwidths are 1.1, 2.2, and 3.7 GHz, at the tri-band frequencies. The antenna’s performance was significantly improved by carefully spacing the elements and employing a decoupling technique using metamaterial cells. This minimized interference between the antenna elements, resulting in efficient MIMO operation with a low envelope correlation coefficient of 0.00015 and a high diversity gain approaching 10 dB, and high isolation of 34.5, 22, and 30 dB, in the tri-band. This proposed design is confirmed with experimental measurements and offers a promising candidate for multi-band use of mmWave communication systems.

High Performance Quad Port Compact MIMO Antenna for 38 GHz 5G Application with Regression Machine Learning Prediction

2025-06-18
Md Ashraful Haque , Md. Sharif Ahammed , Md. Mizanur Rahaman +6 more | Journal of Infrared Millimeter and Terahertz Waves

Beam alignment for mmWave and THz: systematic review

2025-06-17
Sundire Madhekwana , Muhammad Arslan Usman , Ahtisham Ayyub +1 more | Telecommunication Systems

Miniaturized Dual and Quad Port MIMO Antenna Variants Featuring Elevated Diversity Performance for UWB and 5G-Midband Applications

2025-06-17
K. R. Ramanathan , Srivatsun Gopalakrishnan , Thrisha Chandrakanthan | Micromachines
The growing demand for high-speed and high-capacity wireless communication has intensified the need for compact, wideband, and efficient MIMO antenna systems, particularly for 5G mid-band and UWB applications. This article … The growing demand for high-speed and high-capacity wireless communication has intensified the need for compact, wideband, and efficient MIMO antenna systems, particularly for 5G mid-band and UWB applications. This article presents a miniaturized dual and quad port MIMO antenna design optimized for 5G mid-band (n77/n78/n79/n96/n102) and Ultra-Wideband (UWB) applications without employing any decoupling structures between the radiating elements. The 2-port configuration features two closely spaced symmetric monopole elements (spacing < λmax/2), promoting efficient use of space without degrading performance. An FR4 substrate (εr = 4.4) is used for fabrication with a compact size of 30 × 41 × 1.6 mm3. This layout is extended orthogonally and symmetrically to form a compact quad-port variant with dimensions of 60 × 41 × 1.6 mm3. Both designs offer a broad operational bandwidth from 2.6 GHz to 10.8 GHz (8.2 GHz), retaining return loss (SXX) below -10 dB and strong isolation (SXY < -20 dB at high frequencies, <-15 dB at low frequencies). The proposed MIMO antennas demonstrate strong performance and excellent diversity characteristics. The two-port antenna achieves an average envelope correlation coefficient (ECC) of 0.00204, diversity gain (DG) of 9.98 dB, and a mean effective gain difference (MEGij) of 0.3 dB, with a total active reflection coefficient (TARC) below -10 dB and signal delay variation under 0.25 ns, ensuring minimal pulse distortion. Similarly, the four-port design reports an average ECC of 0.01432, DG of 9.65 dB, MEGij difference below 0.3 dB, and TARC below -10 dB, confirming robust diversity and MIMO performance across both configurations.

Wideband patch antenna under dual high-order modes with radiation pattern reshaping

2025-06-17
Runting Gan , Chao‐Yi Cui , Ying Wang +2 more | Electromagnetics

A slot-coupled feeding patch antenna working at <i>TM</i> <sub>30</sub> mode with reshaped radiation pattern

2025-06-17
Xinyi Tang , Keqing Zhang , Dong‐Sheng La +1 more | Electromagnetics

Comprehensive Review of Ku, K, and Ka Band Antenna Designs: Applications in CubeSats

2025-06-17
Yusuf Salih Gurbet , Semih Doğu | International Journal of Aeronautical and Space Sciences

A Miniaturized RHCP Slot Antenna for Wideband Applications Including Sub-6 GHz 5G

2025-06-17
Abbas Mohammed , Falih M. Alnahwi , Yasir I. A. Al‐Yasir +1 more | Technologies
The rapid development of 5G and next-generation wireless systems has increased the demand for antennas that support circular polarization (CP), wide frequency coverage, and a compact size. Achieving wideband CP … The rapid development of 5G and next-generation wireless systems has increased the demand for antennas that support circular polarization (CP), wide frequency coverage, and a compact size. Achieving wideband CP performance in a low-profile and simple structure remains a key challenge for modern antenna designs. In response to this, this paper presents a compact wide-slot antenna with a single feed, offering a wide operational bandwidth and circularly polarized radiation. The proposed design is excited by a 50 Ohm microstrip feedline, and it is fabricated on an (54 × 50 × 1.6 mm3) FR4 dielectric substrate. On the bottom side of the dielectric substrate, the ground plane is engraved to form a square-shaped radiating slot. The shape of the tuning stub of the antenna is modified in order to attain a wide impedance bandwidth and an axial ratio bandwidth (ARBW). The modifications include inserting a rectangular strip and thin horizontal strips into the tuning stub after tapering its upper corner. On the other hand, the radiating slot is appended by two rectangular stubs. The radiation of the resulted structure has right-hand circular polarization (RHCP). The measured results of the proposed antenna show a −10 dB impedance bandwidth equal to 78% (2.65 GHz, 2.08–4.73 GHz), whereas its broadside 3 dB ARBW is 71.6% over the frequencies (2.31 GHz, 2.07–4.38 GHz), which is compatible with various wireless communication applications. Furthermore, the peak value of the measured gain is equal to 4.68 dB, and its value is larger than 2 dBi along the operational bandwidth of the antenna.

Fractals: A Review for the Artificial Intelligence-Assisted Customized Antenna Design

2025-06-17
Deepanshu Kaushal , Rajeevan Chandel , T. Shanmuganantham | Arabian Journal for Science and Engineering

Bandwidth Optimization of an Ultra Wide Band Vivaldi Antenna Design with Its Feed Alignment

2025-06-16
İzzet Güzelkara , Veli Tayfun Kılıç | Osmaniye Korkut Ata Üniversitesi Fen Bilimleri Enstitüsü Dergisi
Ultra wide band applications such as medical imaging, surveillance or indoor localization require different bandwidths. The different bandwidth requirements often present a challenge in terms of antenna design. In this … Ultra wide band applications such as medical imaging, surveillance or indoor localization require different bandwidths. The different bandwidth requirements often present a challenge in terms of antenna design. In this paper, a wideband Vivaldi antenna which is suitable for UWB systems is presented. The antenna is designed and optimized using a 3D electromagnetic simulation tool. Then, a parametric study is carried out that investigates the effect of microstrip feed on the antennas bandwidth. It is demonstrated that the bandwidth of the antenna can be manipulated by changing the total length and the positioning of the microstrip feed without the need for changing any other antenna parameter

Innovative Compact MIMO Antenna for Future 5G Millimeter-Wave Communications

2025-06-16
Nizar Sghaier , Anouar Belkadi , Lassaad Latrach +1 more | Journal of Infrared Millimeter and Terahertz Waves

ADAS radar antenna for mmW/THz communication

2025-06-16
Sapna Chaudhary , Ankush Kansal | Analog Integrated Circuits and Signal Processing