IEEE Transactions on Antennas and Propagation最新文献_第9页

Patch-Based Matrix-Free Time-Domain Method and PML Truncation in Unstructured 3-D Meshes 非结构化三维网格中基于补丁的无矩阵时域方法及PML截断

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2024-12-25 DOI: 10.1109/TAP.2024.3520356

Vinicius C. Do Nascimento;Dan Jiao

{"title":"Patch-Based Matrix-Free Time-Domain Method and PML Truncation in Unstructured 3-D Meshes","authors":"Vinicius C. Do Nascimento;Dan Jiao","doi":"10.1109/TAP.2024.3520356","DOIUrl":"https://doi.org/10.1109/TAP.2024.3520356","url":null,"abstract":"In this article, we propose a new time-domain method for solving Maxwell’s equations: patch-based matrix-free time-domain (P-MFTD) method, in unstructured 3-D meshes. This method is free of matrix solutions regardless of the element shape used for discretization. Unlike its volume-based counterpart, both the curl of electric fields and that of magnetic fields are discretized on 2-D patches, whose orientation can be arbitrary. The method avoids the use of 3-D vector basis functions, thus significantly reducing the number of unknowns required to solve the same problem. Furthermore, a time-marching scheme is developed to ensure the stability of transient simulations, even in the presence of an unsymmetrical numerical system. The accuracy and stability of the proposed time-marching method are theoretically analyzed and found to be guaranteed. Additionally, we extend the formulation to include the truncation of the solution domain by a patch-based perfectly matched layer (PML) in unstructured meshes. The proposed method is validated with analytical solutions, numerical experiments, and measured data. Comparisons with the time-domain finite element (FE) methods and the volume-based MFTD method have demonstrated the superior performance of the proposed method in accuracy, efficiency, and stability in unstructured 3-D meshes.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 3","pages":"1698-1711"},"PeriodicalIF":4.6,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Multifunctional Reconfigurable Intelligent Surface for Wideband Beamforming and Frequency-and-Spatial-Diverse Microwave Sensing 用于宽带波束形成和频率与空间分异微波传感的多功能可重构智能表面

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2024-12-24 DOI: 10.1109/TAP.2024.3519781

Baiyang Liu;Qingfeng Zhang;Hang Wong

{"title":"Multifunctional Reconfigurable Intelligent Surface for Wideband Beamforming and Frequency-and-Spatial-Diverse Microwave Sensing","authors":"Baiyang Liu;Qingfeng Zhang;Hang Wong","doi":"10.1109/TAP.2024.3519781","DOIUrl":"https://doi.org/10.1109/TAP.2024.3519781","url":null,"abstract":"Reconfigurable intelligent surface (RIS), known for their wave manipulation capabilities, are emerging as key technologies, especially in communication and sensing. In this article, we introduce a multifunctional RIS that is noteworthy for its substantial relative impedance bandwidth coverage of 41.3%, offering both frequency and spatial diversities for wideband wide-angle beamforming and object sensing. The proposed multifunctional RIS has been fabricated and measured. Moreover, the RIS utilizes wideband wide-angle beamforming and frequency-and-spatial-diverse technology to demonstrate dual functions: enhancing broadband wireless signals using quadrature amplitude modulation (QAM) and detecting passive objects. Regarding wireless signal enhancement, the RIS boosts signals by an average of 8 dB compared with a metal plate within the wideband frequency range of 15–21 GHz. In terms of frequency-and-spatial-diverse sensing, the proposed RIS is able to sense objects against a background. By introducing joint frequency and spatial diversity, the proposed RIS can further increase capacity in both wireless communication and sensing systems. The multiple functions make the RIS and highly relevant for sixth-generation (6G) communication systems and integrated sensing and communication (ISAC) applications.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 2","pages":"1135-1148"},"PeriodicalIF":4.6,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

On the Surface-Integral-Equation-Based Characteristic Mode Expansion of Dielectric Body With Internal Excitations 基于表面积分方程的介电体内部激励特征模态展开

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2024-12-24 DOI: 10.1109/TAP.2024.3519740

Chong Guo;Yong-Chang Jiao;Yi Ren

引用次数: 0

Beam-Scanning Reflectarray With Switchable Polarization Based on Liquid Crystal at Millimeter Wave 基于液晶的毫米波可调偏振波束扫描反射阵列

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2024-12-23 DOI: 10.1109/TAP.2024.3518696

Peyman Aghabeyki;Yang Cai;Guangsheng Deng;Gert Frølund Pedersen;Shuai Zhang

引用次数: 0

Fast Zero Migration Algorithm for Near-Field Sparse MIMO Array Grating Lobe Suppression 近场稀疏MIMO阵列光栅瓣抑制的快速零迁移算法

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2024-12-23 DOI: 10.1109/TAP.2024.3489890

Rongqiang Zhu;Jianxiong Zhou;Shiqi Chen;Haiyang Ding

{"title":"Fast Zero Migration Algorithm for Near-Field Sparse MIMO Array Grating Lobe Suppression","authors":"Rongqiang Zhu;Jianxiong Zhou;Shiqi Chen;Haiyang Ding","doi":"10.1109/TAP.2024.3489890","DOIUrl":"https://doi.org/10.1109/TAP.2024.3489890","url":null,"abstract":"Under near-field conditions, spatial undersampling leads to grating lobes in the sparse multiple-input multiple-output (MIMO) array results. A fast zero migration algorithm is developed in this communication for suppressing the grating lobes. In our method, resampling in the wavenumber domain is first achieved on the received data, and then, the fast inverse Fourier transform (FT) and compensation on the image domain is leveraged for achieving zero migration of transceiver array. By applying apodization on the zero migration result, zero spreading is equivalently achieved and thus alleviate the influence of grating lobe spreading under near-field conditions and avoid the ghosts in the imaging results. Benefit from its fast FT-based processing scheme, the method achieves a reduction in computational complexity from O(<inline-formula> <tex-math>${N} ^{4}$ </tex-math></inline-formula>) to O(<inline-formula> <tex-math>${N} ^{3}$ </tex-math></inline-formula>logN). Both simulated and measured data validate the superiority of the method in effectively suppressing grating lobes and improving the processing efficiency.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 2","pages":"1286-1291"},"PeriodicalIF":4.6,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143184469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

On the Synthesis of Null-Scanning Leaky-Wave Antennas (NSLWAs) for Millimeter-Wave Direction-Finding Applications 毫米波测向用零扫描漏波天线的合成研究

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2024-12-20 DOI: 10.1109/TAP.2024.3518060

Dongze Zheng;Yan Zhang;Geng-Bo Wu;Zhi Hao Jiang;Chi Hou Chan;Ke Wu;Wei Hong

{"title":"On the Synthesis of Null-Scanning Leaky-Wave Antennas (NSLWAs) for Millimeter-Wave Direction-Finding Applications","authors":"Dongze Zheng;Yan Zhang;Geng-Bo Wu;Zhi Hao Jiang;Chi Hou Chan;Ke Wu;Wei Hong","doi":"10.1109/TAP.2024.3518060","DOIUrl":"https://doi.org/10.1109/TAP.2024.3518060","url":null,"abstract":"The inborn spectral-spatial decomposition property of leaky-wave antennas (LWAs) makes them well-suitable for low-cost direction-finding (DF) applications. Conventional LWAs are characterized by a frequency-scanned directive beam, upon which the DF can be performed by searching the spectral peak of echo signals. In contrast, we study in this work a class of LWAs exhibiting frequency-scanned radiation null, i.e., null-scanning LWAs (NSLWAs), which can be exploited for DF via searching the relevant spectral null. This NSLWA consists of a pair of specially engineered LWA elements that work collaboratively to synthesize a radiation null along the scanning plane. The synthesis theories regarding how to model these LWA elements conforming to certain specifications and how to determine their excitation phases are systematically discussed. Also, a generalized design flow is summarized to facilitate practical developments of this emerging antenna class. A simple NSLWA example based on two typical microstrips combline LWA elements is constructed, simulated, and measured for case studies. Simulated and measured results are in good agreement, and both exhibit the desired characteristic of frequency-scanned radiation null. While the radiation/spectral null essentially has a larger steepness than the relevant peak, the NSLWAs may find greater potential than conventional LWAs in high-performance DF applications.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 4","pages":"2462-2474"},"PeriodicalIF":4.6,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143801004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

2024 IEEE AP-S Piergiorgio L.E. Uslenghi Prize Paper Award 2024 IEEE AP-S Piergiorgio L.E. Uslenghi奖论文奖

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2024-12-19 DOI: 10.1109/TAP.2024.3503095

Modeste Bodehou;Gilles Monnoyer;Maxime Drouguet;Khaldoun Alkhalifeh;Luc Vandendorpe;Christophe Craeye

引用次数: 0

2024 IEEE AP-S Ulrich L. Rohde Humanitarian Technical Field Project Award 2024 IEEE AP-S Ulrich L. Rohde人道主义技术领域项目奖

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2024-12-19 DOI: 10.1109/TAP.2024.3503030

引用次数: 0

Circuit-Informed Neural Network for Broadening the Bandwidth of SIW-Fed Slot Antennas 扩宽窄带馈电槽天线带宽的电路通知神经网络

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2024-12-19 DOI: 10.1109/TAP.2024.3516388

Ren Wang;Hong-Yuan Chang;Yan-He Lv;Hao Huang;Jun-Song Wang;Bing-Zhong Wang

引用次数: 0

2024 Distinguished Achievement Award 2024杰出成就奖

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2024-12-19 DOI: 10.1109/TAP.2024.3502972

Stuart A. Long

引用次数: 0