Iet Microwaves Antennas & Propagation最新文献

Three-Dimensional Integral Equation-based GSTC Method for Composite Structure With Arbitrary-Shaped Nonpenetrating Metasurface

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-03-27 DOI: 10.1049/mia2.70012

Inhwan Kim, Yeonghoon Noh, Hyeong-Rae Im, Ic-Pyo Hong, Hyunsoo Lee, Jong-Gwan Yook

{"title":"Three-Dimensional Integral Equation-based GSTC Method for Composite Structure With Arbitrary-Shaped Nonpenetrating Metasurface","authors":"Inhwan Kim, Yeonghoon Noh, Hyeong-Rae Im, Ic-Pyo Hong, Hyunsoo Lee, Jong-Gwan Yook","doi":"10.1049/mia2.70012","DOIUrl":"https://doi.org/10.1049/mia2.70012","url":null,"abstract":"This study proposes a novel three-dimensional integral-equation-based electromagnetic solver with surface susceptibilities of metasurfaces that satisfy the generalised sheet transition conditions (GSTCs). The metasurface is replaced by an equivalent zero-thickness sheet with surface susceptibilities, which can be extracted using the retrieval method deduced from the GSTCs. We consider the problems of composite structures with metasurfaces for greater generality and applicability. The integral equations of the problems are formulated and discretised using Rao–Wilton–Glisson (RWG) basis functions through Galerkin's testing procedure. We also propose a technique for enforcing the boundary condition at the interface, which should be carefully considered within the problem formulation of composite structures. The proposed method is validated by using a circuit-analog-based absorber to extract the surface susceptibilities. Composite structures, including flat and curved metasurfaces, are employed to verify the IE-GSTC solver, and numerical simulation results are compared with those obtained from a commercial finite-element method-based simulation (FEM-HFSS).","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"19 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.70012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143717411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on Aperture-Level Simultaneous Transceiver Technology Utilising an Improved Quantum Genetic Algorithm

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-03-21 DOI: 10.1049/mia2.70011

Yong Bo, Hong Cao, Mouping Jin, Quan Wang, Wei Chen, Yong Ye, Lixia Yang

{"title":"Research on Aperture-Level Simultaneous Transceiver Technology Utilising an Improved Quantum Genetic Algorithm","authors":"Yong Bo, Hong Cao, Mouping Jin, Quan Wang, Wei Chen, Yong Ye, Lixia Yang","doi":"10.1049/mia2.70011","DOIUrl":"https://doi.org/10.1049/mia2.70011","url":null,"abstract":"Self-interference (SI) suppression has always been critical for simultaneous transmit and receive (STAR) systems. To address the strong coupling between nearby transmit and receive antennas, this study employs an improved quantum genetic algorithm (IQGA) to eliminate SI by combining digital self-interference cancellation (SIC) and adaptive beamforming (ABF). Through digital SIC, both transmit noise and transmit signals are suppressed. The objective of the transceiver beamformer is to further reduce SI through SIC while simultaneously achieving high transceiver gain in the desired direction. IQGA represents the weights of feasible transceiver beams using chromosomes. By updating the population through quantum rotation, quantum crossover and quantum mutation strategies, IQGA demonstrates improvements in convergence accuracy, convergence speed, and reliability. In comparison to traditional ABF approaches, IQGA eliminates the need for complex matrix calculations and numerical derivations, thereby simplifying the solution process. The simulation results indicate that by cancelling the SI component through SIC and ABF, an isolation of 159.78 dB can be achieved at a transmit power of 1000 W. This represents an improvement of 40.32 dB compared to SIC alone and 113.87 dB compared to scenarios without SIC and ABF.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"19 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.70011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Emulation of Realistic GNSS Scenarios Over 3D Wave Field Synthesis and Over-The-Air Testing 通过三维波场合成和空中测试模拟真实的 GNSS 场景

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-03-19 DOI: 10.1049/mia2.70009

Renato Zea Vintimilla, Kevin Drenkhahn, Christoph Wagner, Mario Lorenz, Markus Landmann, Giovanni del Galdo

{"title":"Emulation of Realistic GNSS Scenarios Over 3D Wave Field Synthesis and Over-The-Air Testing","authors":"Renato Zea Vintimilla, Kevin Drenkhahn, Christoph Wagner, Mario Lorenz, Markus Landmann, Giovanni del Galdo","doi":"10.1049/mia2.70009","DOIUrl":"https://doi.org/10.1049/mia2.70009","url":null,"abstract":"Over-the-air (OTA) tests have become an essential tool to assess the performance of a wireless device under controllable and repeatable conditions. Such benefits provide a deep insight into the device under test (DUT) performance; nevertheless, the realism achieved by OTA tests is still moderate in comparison to open-field tests. This contribution takes the OTA testing method for wireless devices and combines it with the wave field synthesis (WFS) technique to increase the efficiency, reliability and especially the realism of the tests. The main focus of this contribution is to use the aforementioned method to emulate realistic GNSS scenarios inside an anechoic chamber, where multiple virtual satellite signals are electronically generated in the far field along with their individual trajectories. For the validation and verification of the method, a commercial GNSS antenna and receiver are placed as the DUT inside the chamber. The WFS calibration methods implemented in an OTA testbed are described in detail along with the performance analysis obtained by each method. This study strives to establish the foundation for a forthcoming standardisation of the proposed methodology, applicable not only to GNSS devices but also to any variety of wireless devices.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"19 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.70009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of Artificial Electromagnetic Materials Using ResNet-Based Deep Learning Method

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-03-19 DOI: 10.1049/mia2.70007

Yu Xie, Yi Wang, Songran Guo

{"title":"Design of Artificial Electromagnetic Materials Using ResNet-Based Deep Learning Method","authors":"Yu Xie, Yi Wang, Songran Guo","doi":"10.1049/mia2.70007","DOIUrl":"https://doi.org/10.1049/mia2.70007","url":null,"abstract":"The design of artificial electromagnetic materials (AEMMs) depends highly on full-wave numerical simulations or equivalent circuit model (ECM)-assisted analysis. This work proposes an intelligent design method using a deep learning (DL) technique based on the residual neural network (ResNet) to improve its efficiency. Firstly, adopting pixeled matrix modelling methods enhances the freedom of design. Next, the staircase approximation is utilised for the S-parameter curve, which also describes the required electromagnetic (EM) property to be used in the training process. These processed samples, along with their corresponding labels, are transformed and fed into ResNet for training. After these procedures, the structural matrix of the desired curve can be predicted through well-trained networks. To validate the effectiveness of the method, typical notched-band frequency selective absorbers (FSAs) are designed, while the reflective band can easily be adjusted. Compared with conventional methods and other deep neural network (DNN)-based methods, this method performs more efficiently and accurately. Finally, an illustrative sample is fabricated to validate the prediction result.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"19 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.70007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143689158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Broadband LTCC-Based Cavity-Backed Patch Phased Array Antenna for Ka-Band Applications

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-03-17 DOI: 10.1049/mia2.70004

Maryam Sadeghi, Mohammad S. Sharawi, Dawood S. Beyragh, Ammar B. Kouki, Mohamed Helaoui, Noureddine Outaleb, Wenhua Chen, Fadhel M. Ghannouchi

{"title":"A Broadband LTCC-Based Cavity-Backed Patch Phased Array Antenna for Ka-Band Applications","authors":"Maryam Sadeghi, Mohammad S. Sharawi, Dawood S. Beyragh, Ammar B. Kouki, Mohamed Helaoui, Noureddine Outaleb, Wenhua Chen, Fadhel M. Ghannouchi","doi":"10.1049/mia2.70004","DOIUrl":"https://doi.org/10.1049/mia2.70004","url":null,"abstract":"This paper presents a 4 <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mo>×</mo>\u0000 </mrow>\u0000 <annotation> ${times} $</annotation>\u0000 </semantics></math> 4 millimeter-wave (mm-wave) phased array antenna operating in the Ka-band (27–34 GHz) fabricated using low-temperature co-fired ceramic (LTCC) technology. The proposed array employs several innovative design features to achieve superior performance. An oversized aperture, combined with a parasitic patch and an embedded air cavity, significantly enhances the gain and bandwidth. Additionally, an asymmetric stripline feed structure minimises back radiation and facilitates multi-layer integration, enabling seamless compatibility with beamforming systems. The antenna demonstrates a measured impedance bandwidth of 27% and a realised gain of 17.5 dBi at 29 GHz, with a scanning angle of <math>\u0000 <semantics>\u0000 <mrow>\u0000 <mo>±</mo>\u0000 <mn>25</mn>\u0000 <mo>°</mo>\u0000 </mrow>\u0000 <annotation> $pm 25{}^{circ}$</annotation>\u0000 </semantics></math>. These results establish the design as a compact, high-efficiency, and broadband solution for mm-wave phased array applications in 5G and beyond. Experimental validation using a 16-channel beamformer module further highlights the practicality of the design for real-world deployment.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"19 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.70004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multiband waveguide filters with advanced filtering characteristics based on an in-band transmission zeros method and stacked cylindrical resonators 基于带内传输零点法和叠层圆柱谐振器的具有高级滤波特性的多频带波导滤波器

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-03-03 DOI: 10.1049/mia2.70001

Povilas Vaitukaitis, Jiayu Rao, Kenneth Nai, Jiasheng Hong

{"title":"Multiband waveguide filters with advanced filtering characteristics based on an in-band transmission zeros method and stacked cylindrical resonators","authors":"Povilas Vaitukaitis, Jiayu Rao, Kenneth Nai, Jiasheng Hong","doi":"10.1049/mia2.70001","DOIUrl":"https://doi.org/10.1049/mia2.70001","url":null,"abstract":"This paper significantly improves the previously proposed novel multiband waveguide filter implementation employing cylindrical resonators. The improved model has the advantages of a further reduced footprint using stacking shunt resonators horizontally and vertically and the ability to realise advanced filtering functions, including transmission zeros below and above the passbands. The coupling matrix synthesis with a brief example and a detailed filter design with considerations for additional coupling and in-line and folded topologies is given. Several filter prototypes, namely third-order quad-band and quintuple-band in-line filters and a sixth-order dual-band folded filter in Ku-band, were designed to validate the proposed model. Selective laser melting (SLM), a metal 3-D printing technique where metal powder is selectively melted with a laser layer by layer, was used to fabricate a dual-band folded filter prototype in copper to validate the proposed model since the model has a complex inner geometry. Additionally, selective laser melting has the advantage of monolithic near-net shape fabrication, eliminating assembly, improving reliability, and reducing weight. The measured results show good agreement with the simulations.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"19 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.70001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143535889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nested Horn-Based 3D-Printed Dual-Band High-Gain Conical Beam Antenna

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-03-03 DOI: 10.1049/mia2.70008

Li Wu, Sipei Wu, Shuai Zhang, Hui Xue, Boyang Qian

{"title":"Nested Horn-Based 3D-Printed Dual-Band High-Gain Conical Beam Antenna","authors":"Li Wu, Sipei Wu, Shuai Zhang, Hui Xue, Boyang Qian","doi":"10.1049/mia2.70008","DOIUrl":"https://doi.org/10.1049/mia2.70008","url":null,"abstract":"Dual-band antennas have found extensive applications in the fields of communications, guidance, tracking systems, etc. However, traditional designs often struggle to simultaneously achieve high gain, wide impedance bandwidth and conical beam characteristics. In response to this challenge, a dual-band high-gain conical beam antenna with broad impedance bandwidth based on a nested horn operating at Ku-/Ka-band is presented in this paper. The nested horn excited by metal probes comprises a Ka-band circular waveguide horn and an outer nested Ku-band waveguide horn. The proposed antenna operates in the TM01 mode, demonstrating rotationally symmetrical field distribution, which enables the generation of conical beams. The utilisation of a ridge waveguide further widens the impedance bandwidth. The incorporation of dual reflectors enhances the directivity of electromagnetic wave propagation, leading to increased gain and a fixed beam pointing angle. The measured results show that the proposed antenna operates at 12.8–18 GHz in the Ku-band and 25.2–43.5 GHz in the Ka-band, with relative impedance bandwidths of approximately 33.8% and 53.3%, respectively, covering nearly the entire Ku-band and Ka-band. The peak gain reaches 12.2 dBi at 15 GHz and 16.4 dBi at 40 GHz. Furthermore, the maximum beam pointing angles are maintained at 30° for both frequency bands.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"19 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.70008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143535888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual-Band Circularly Polarised Asymmetric Linear-Tapered Horn Antenna for Feeder of Synthetic Aperture Radar Onboard Microsatellite

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-03-02 DOI: 10.1049/mia2.70006

Derry Permana Yusuf, Josaphat Tetuko Sri Sumantyo, Yuki Yoshimoto, Steven Gao, Koichi Ito

{"title":"Dual-Band Circularly Polarised Asymmetric Linear-Tapered Horn Antenna for Feeder of Synthetic Aperture Radar Onboard Microsatellite","authors":"Derry Permana Yusuf, Josaphat Tetuko Sri Sumantyo, Yuki Yoshimoto, Steven Gao, Koichi Ito","doi":"10.1049/mia2.70006","DOIUrl":"https://doi.org/10.1049/mia2.70006","url":null,"abstract":"This paper presents a novel dual-band waveguide-fed circularly polarised (CP) horn antenna for the feeder of synthetic aperture radar (SAR) onboard microsatellite. The proposed horn antenna consists of an asymmetric linearly tapered slot and a waveguide feed. The C-/X-band left-hand circular polarisation (LHCP) design was simulated, and the 3D-printed prototype was fabricated to validate the simulation and measured in an anechoic chamber. The measured circularly polarised (CP) antenna can achieve dual-band operations with a 3 dB axial ratio bandwidth of 40% (5–6.5 GHz; 8.5–10 GHz), VSWR less than 1.4 in the operating band and a peak gain of 13.6 dBic (5.3 GHz) and 18.5 dBic (9.4 GHz). The measured half-power beamwidth (HPBW) at C-band and X-band frequencies in the xz-plane and yz-plane are achieved at 26°/37° and 18°/23°, respectively. The proposed antenna offers several advantages over current CP antenna designs, including simpler design, low-cost manufacturing, better impedance matching, wider AR bandwidth and lower sidelobe levels.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"19 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.70006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143530043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An LC Quadrature VCO With Compensated Coupling Networks for Low Supply Sensitivity and I/Q Phase Enhancement

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-02-26 DOI: 10.1049/mia2.70005

Yukun He, Renjie Tang, Ka'nan Wang, Dan Li, Li Geng, Xiaoyan Gui

引用次数: 0

An Inhomogeneously-Loaded Diaphragm in a Microwave Rectangular Waveguide

IF 1.1 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2025-02-21 DOI: 10.1049/mia2.70003

Abdulaziz H. Haddab, Edward F. Kuester

引用次数: 0