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Accurate Sparse Conformal Mesh Generation Method for Reducing Spatial Redundancy in Conformal FDTD 减少共形FDTD空间冗余的精确稀疏共形网格生成方法
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-01-13 DOI: 10.1109/LAWP.2025.3527451
Yuan Fan;Yuhao Zhou;Yanan Liu;Han Liu;Xiao Xu;Liuge Du;Jia Zhao
{"title":"Accurate Sparse Conformal Mesh Generation Method for Reducing Spatial Redundancy in Conformal FDTD","authors":"Yuan Fan;Yuhao Zhou;Yanan Liu;Han Liu;Xiao Xu;Liuge Du;Jia Zhao","doi":"10.1109/LAWP.2025.3527451","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3527451","url":null,"abstract":"A 3D-CAD-based sparse conformal mesh generation (SC-MG) method is proposed to distinguish between conformal and nonconformal cells and calculate the volume fraction of perfectly matched object boundaries. A sparse conformal finite difference time domain (SC-FDTD) method specifically adapted to the SC-MG approach is also developed, which uses sparse storage to reduce the spatial redundancy of the FDTD iterative coefficients. The SC-MG method with lower time complexity is demonstrated to effectively resolve the distortion and loss of surface of the marching cubes-based method. The SC-FDTD has been shown to combine the benefits of low spatial redundancy of the staircase FDTD with the high accuracy characteristic of the conformal FDTD.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 5","pages":"1134-1138"},"PeriodicalIF":3.7,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of Transmitting-Type Dual-Frequency Beam Steering Surfaces With Flexible Frequency Ratio 具有柔性频率比的发射型双频波束转向面设计
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-01-13 DOI: 10.1109/LAWP.2025.3529041
De Yin;Lei Zhu;Wanping Zhang;Bo Li
{"title":"Design of Transmitting-Type Dual-Frequency Beam Steering Surfaces With Flexible Frequency Ratio","authors":"De Yin;Lei Zhu;Wanping Zhang;Bo Li","doi":"10.1109/LAWP.2025.3529041","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3529041","url":null,"abstract":"Conventional dual-frequency beam steering surface (DF-BSS) can only adjust frequency ratio (FR) in a narrow range, and this letter presents a novel design concept for transmitting-type DF-BSS to broaden it. To reach this target, by utilizing two methods (choosing different resonant modes of the patch and adjusting the positions of loaded pins), the FR can be adjusted from 1.49 to 3.50. Based on mode excitation and inhibition theory, by placing the equivalent feeding ports at proper positions, the higher frequency (<inline-formula><tex-math>$f_{H}$</tex-math></inline-formula>) and the lower frequency (<inline-formula><tex-math>$f_{L}$</tex-math></inline-formula>) can work separately. To verify our design concept, two DF-BSS cases (Case Ⅰ: <inline-formula><tex-math>$f_{H}$</tex-math></inline-formula> = 11.1 GHz, <inline-formula><tex-math>$f_{L}$</tex-math></inline-formula> = 7.43 GHz, FR = 1.49; Case Ⅱ: <inline-formula><tex-math>$f_{H}$</tex-math></inline-formula> = 16.8 GHz, <inline-formula><tex-math>$f_{L}$</tex-math></inline-formula> = 4.8 GHz, FR = 3.5) with different beam steering angles are fabricated and measured. The bandwidths of the two cases both exceed 1.4%. The good agreements between measured results and expectations show the great potential of the proposed DF-BSS in rebuilding the propagating paths for electromagnetic waves.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 5","pages":"1168-1172"},"PeriodicalIF":3.7,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Wideband Printed Dipole Antenna With Small Footprint Using a Miniaturized Microstrip-to-Coplanar Strips (CPS) Transition 采用微带共面带（CPS）转换的小尺寸宽带印刷偶极子天线
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-01-13 DOI: 10.1109/LAWP.2025.3529415
Jo Tamura;Ryoto Ogushi;Hiroyasu Ishikawa;Hiroyuki Arai
{"title":"A Wideband Printed Dipole Antenna With Small Footprint Using a Miniaturized Microstrip-to-Coplanar Strips (CPS) Transition","authors":"Jo Tamura;Ryoto Ogushi;Hiroyasu Ishikawa;Hiroyuki Arai","doi":"10.1109/LAWP.2025.3529415","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3529415","url":null,"abstract":"This letter presents a wideband printed dipole antenna for multistandard mobile communication. The antenna consists of a bow-tie shaped driven element, a parasitic radiator, and a new microstrip-to-coplanar strips transition. Unlike traditional transitions using a phase delay line, the new one utilizes a 180° hybrid having frequency-independent amplitude and phase balance. The replacement enhances the transition bandwidth, minimizes the footprint, and offers a simpler design with fewer design parameters. The measurement results show that the transition has a fractional bandwidth (<inline-formula><tex-math>$|S_{11}|&lt; -10$</tex-math></inline-formula> dB) as wide as 91.9% in a back-to-back configuration. As a result, the antenna achieves the bandwidth of 61.6% with a constant gain of <inline-formula><tex-math>$text{4.2},text{dBi}pm 0.5$</tex-math></inline-formula> dBi and low cross-polarization level of better than −14.8 dB from 1.5 GHz to 2.5 GHz.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 5","pages":"1173-1177"},"PeriodicalIF":3.7,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Uniplanar, Quasi-Isotropic Folded Dipole Design Based on Hybrid GA-PSO Optimization 基于GA-PSO混合优化的单平面准各向同性折叠偶极子设计
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-01-10 DOI: 10.1109/LAWP.2025.3528112
Shaopeng Wan;Bin He;Ping Lu;Xuehui Guan;Xiaoyan Zhang
{"title":"A Uniplanar, Quasi-Isotropic Folded Dipole Design Based on Hybrid GA-PSO Optimization","authors":"Shaopeng Wan;Bin He;Ping Lu;Xuehui Guan;Xiaoyan Zhang","doi":"10.1109/LAWP.2025.3528112","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3528112","url":null,"abstract":"A uniplanar quasi-isotropic folded dipole is proposed by using a hybrid genetic algorithm and particle swarm optimization (GA-PSO) algorithm. The proposed antenna is evolved from a half-wave dipole, where the dipole is folded to achieve a pair of out-of-phase line sources and an orthogonal line source, thereby obtaining a quasi-isotropic radiation pattern. Based on GA-PSO algorithm, the bending position is optimized for the minimum gain difference. For demonstration, the dipole prototype operating at 915 MHz is designed and fabricated in which a parallel transmission line with comb-like structure is adopted to achieve good impedance matching. The measured result shows a gain difference of 2.81 dB, and the simulated value is 0.34 dB. Compared with other quasi-isotropic antennas, the proposed antenna has the merits of simple structure, low gain difference, and uniplanar structure.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 5","pages":"1158-1162"},"PeriodicalIF":3.7,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Characteristic Modes Analysis of Finite Periodic Array With Object Using Entire Domain Basis Function Method and ACA 基于全域基函数法和ACA的有目标有限周期阵列特征模态分析
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-01-10 DOI: 10.1109/LAWP.2025.3527927
Zi-Wen Tong;Ping Du;Gang Zheng
{"title":"Characteristic Modes Analysis of Finite Periodic Array With Object Using Entire Domain Basis Function Method and ACA","authors":"Zi-Wen Tong;Ping Du;Gang Zheng","doi":"10.1109/LAWP.2025.3527927","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3527927","url":null,"abstract":"In this letter, the entire domain (ED) basis function method is applied to the modes analysis of the composite finite periodic array-object. To construct the ED basis functions, the modes analysis of the array cell and object are performed, respectively. The eigenvalues and eigencurrents are obtained. The ED bases on the cell and the object are constructed using a few eigencurrents. Then, the reduced generalized eigenvalue equation (GEE) based on the ED bases will be obtained. By solving the equation, the characteristic modes of the composite structure can be analyzed. To reduce the fill-in time of matrices in the GEE, the adaptive cross approximation is introduced. Numerical results validate the accuracy of the proposed method. Moreover, the CPU time is dramatically reduced.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 5","pages":"1149-1152"},"PeriodicalIF":3.7,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Planar Array Beamforming Method Based on Transfer Learning 一种基于迁移学习的平面阵列波束形成方法
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-01-10 DOI: 10.1109/LAWP.2025.3528039
Jianming Huang;Rui Liu;Naibo Zhang;Yansong Cui
{"title":"A Planar Array Beamforming Method Based on Transfer Learning","authors":"Jianming Huang;Rui Liu;Naibo Zhang;Yansong Cui","doi":"10.1109/LAWP.2025.3528039","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3528039","url":null,"abstract":"A training method based on transfer learning is proposed in this article, which completes the beamforming task of a deep neural network based on ResNet through two stages: “data approximation” and “pattern approximation.” It is shown in the numerical simulations that the proposed method achieves better performance in beamforming tasks compared to the Dolph–Chebyshev method and the genetic algorithm. The model can generate complex excitation for arbitrary beam directions within the 0°∼45° off-axis angle range and control the sidelobe levels within the 20 dB to 40 dB range. Furthermore, with the support of a suitable computation platform, the synthesis process can be completed in about 0.04 seconds, which meets practical requirements in real-time synthesis, especially in the field of 5G communications.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 5","pages":"1153-1157"},"PeriodicalIF":3.7,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
IEEE Antennas and Wireless Propagation Letters Publication Information IEEE天线与无线传播通讯出版信息
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-01-08 DOI: 10.1109/LAWP.2024.3520874
{"title":"IEEE Antennas and Wireless Propagation Letters Publication Information","authors":"","doi":"10.1109/LAWP.2024.3520874","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3520874","url":null,"abstract":"","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 1","pages":"C2-C2"},"PeriodicalIF":3.7,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10833929","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142937994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Compact Distance-Adaptive Wireless Power Transfer Using a Reconfigurable Auxiliary Coil 使用可重构辅助线圈的紧凑距离自适应无线电力传输
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-01-08 DOI: 10.1109/LAWP.2025.3526916
Weijun Hong;Jingchen Wang;Eng Gee Lim;Mark Leach;Zhao Wang;Rui Pei;Yi Huang
{"title":"Compact Distance-Adaptive Wireless Power Transfer Using a Reconfigurable Auxiliary Coil","authors":"Weijun Hong;Jingchen Wang;Eng Gee Lim;Mark Leach;Zhao Wang;Rui Pei;Yi Huang","doi":"10.1109/LAWP.2025.3526916","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3526916","url":null,"abstract":"In this letter, we propose a distance-adaptive wireless power transfer (WPT) system using a reconfigurable transmitter. The proposed transmitter incorporates a main coil and an auxiliary coil with adjustable currents. The auxiliary coil can be configured to directly control the coupling strength, which can mitigate excessive or insufficient coupling caused by distance variations. The distance adaptation capability of the proposed WPT system is verified through both simulations and experiments. Measurements of transmission coefficients show maximum increase of 64% at close range (15 mm) and 57% at long range (110 mm). The overall effective transmission range has been improved by 59%. The proposed design offers a simple yet effective approach to distance adaptation while maintaining compact system dimensions.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 5","pages":"1114-1118"},"PeriodicalIF":3.7,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Low-Profile Tri-Port Multimode Metasurface-Based Antenna Using Characteristic Mode Analysis 基于特征模分析的低轮廓三端口多模超表面天线
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-01-08 DOI: 10.1109/LAWP.2025.3527036
Zhaoneng Jiang;Shuai Meng;Liying Nie;Jiquan Qi;Fangzheng Ji
{"title":"A Low-Profile Tri-Port Multimode Metasurface-Based Antenna Using Characteristic Mode Analysis","authors":"Zhaoneng Jiang;Shuai Meng;Liying Nie;Jiquan Qi;Fangzheng Ji","doi":"10.1109/LAWP.2025.3527036","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3527036","url":null,"abstract":"In this letter, a metasurface (MTS)-based antenna is proposed for low-profile and multimode operation. An Omnidirectional radiation pattern is excited through a central coaxial cable. A pair of <inline-formula><tex-math>$text{e-TM}_{20}$</tex-math></inline-formula> modes with broadside radiation patterns are excited via slot coupling. The size and shape of the peripheral patches of the MTS were adjusted by using characteristic mode analysis (CMA) to increase the bandwidth of the omnidirectional mode and decrease the resonant frequency of the <inline-formula><tex-math>$text{e-TM}_{20}$</tex-math></inline-formula> mode. Three modes can operate independently without interfering due to the properly designed feeding networks for each mode. The isolation between ports is greater than 25 dB. The optimized size of the antenna is 0.96<inline-formula><tex-math>$lambda_{min}$</tex-math></inline-formula> × 0.96<inline-formula><tex-math>$lambda_{min}$</tex-math></inline-formula> × 0.07<inline-formula><tex-math>$lambda_{min}$</tex-math></inline-formula>. By enabling multiple modes to operate in different frequency bands on a single MTS, antenna cost, and occupied space can be significantly reduced.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 5","pages":"1119-1123"},"PeriodicalIF":3.7,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Isolation Improvement and Bandwidth Enhancement of Dual-Band MIMO Antenna Based on Metamaterial Wall 基于超材料壁的双频MIMO天线隔离改进与带宽增强
IF 3.7 2区 计算机科学
IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-01-08 DOI: 10.1109/LAWP.2025.3527688
Heming Wang;Qi Zheng;Qiwei Li;Xue-Xia Yang
{"title":"Isolation Improvement and Bandwidth Enhancement of Dual-Band MIMO Antenna Based on Metamaterial Wall","authors":"Heming Wang;Qi Zheng;Qiwei Li;Xue-Xia Yang","doi":"10.1109/LAWP.2025.3527688","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3527688","url":null,"abstract":"A new method of isolation improvement and bandwidth enhancement for the dual-band multiple-input–multiple-ouput (MIMO) antenna based on a metamaterial wall is proposed. The proposed antenna consists of a 2 × 1 dual-band antenna and a metal-line-based metamaterial wall (MLB-MW). On the one hand, the isolation improvement is achieved by the mu-negative metamaterial (MNG) characteristic of the MLB-MW. The isolation improved by 36 dB after loading the MLB-MW. On the other hand, the bandwidth enhancement is obtained by generating additional resonance by the MLB-MW. The operating bandwidths (|<italic>S</i><sub>11</sub>| < −10 dB) have been increased from 3.54 GHz to 4.01 GHz and 4.72 GHz to 5.08 GHz to 3.41 GHz to 4.02 GHz and 4.67 GHz to 5.14 GHz, resulting in the bandwidth extensions of 32% and 30%, respectively. The dimension of the MIMO antenna is 0.70λ<sub>L</sub>×0.29λ<sub>L</sub>×0.23λ<sub>L</sub> (λ<sub>L</sub> is the wavelength of the lowest frequency). To validate the results, a prototype was fabricated and measured in an anechoic chamber, and the results show that the proposed antenna can be a candidate for 5G base station applications.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 5","pages":"1144-1148"},"PeriodicalIF":3.7,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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