IEEE Transactions on Antennas and Propagation最新文献_第6页

Microwave, mm and THz Imaging and Sensing Systems and Technologies for Medical Applications

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-20 DOI: 10.1109/TAP.2024.3519848

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Institutional Listings

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-20 DOI: 10.1109/TAP.2024.3519846

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Systematic and Accurate Method to Model Dielectric Stratifications in Artificial Dielectric Layers 系统而准确地模拟人工介电层中介电分层的方法

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-20 DOI: 10.1109/TAP.2025.3529196

Roderick G. Tapia Barroso;Daniele Cavallo

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Corrections to “Single-Transistor Impedance Matching Circuit for Over-Hundred-Octave Active Antennas”

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-20 DOI: 10.1109/TAP.2024.3504004

Shuyu Wang;Yue Li

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Numerical and Analytical Methods for Complex Electromagnetic Media

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-20 DOI: 10.1109/TAP.2024.3519911

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An Anderson Acceleration Inspired VBIM for Solving the Electromagnetic Inverse Scattering Problems 基于Anderson加速度的VBIM求解电磁逆散射问题

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-20 DOI: 10.1109/TAP.2025.3528749

Hongguang Zhou;Yanwen Zhao;Yan Wang;Danfeng Han;Jun Hu

{"title":"An Anderson Acceleration Inspired VBIM for Solving the Electromagnetic Inverse Scattering Problems","authors":"Hongguang Zhou;Yanwen Zhao;Yan Wang;Danfeng Han;Jun Hu","doi":"10.1109/TAP.2025.3528749","DOIUrl":"https://doi.org/10.1109/TAP.2025.3528749","url":null,"abstract":"This article proposes an adaptive damping Anderson acceleration (ADAA) method that augments the variational Born iterative method (VBIM) for solving the electromagnetic inverse scattering problems (ISPs). Traditionally, the Anderson acceleration (AA) method accelerates convergence in fixed-point iterations by extrapolating solutions from a linear combination of previous iterations. However, different from the fixed-point iteration, whose operator is definite, the mapping operator in the VBIM is approximate and noncontractive. A necessary modification is made by substituting the gradient-acceptance-based strategy in standard AA to the total-quantity-acceptance-based strategy. Additionally, considering the later work in AA demonstrates a damping factor boosts the convergence speed of AA, we present an adaptive damping strategy to further augment the inversion’s convergence rate. The dual-enhancements significantly improve both the speed and robustness of convergence. From a mathematical perspective, the VBIM-ADAA method seeks an exact data equation solution in a subspace spanned by previous regularization solutions during each iteration. Furthermore, the robustness facilitated by VBIM-ADAA permits a broader range of choices for the regularization parameter. By leveraging QR factorization (via the Gram-Schmidt process), we analyze the VBIM-ADAA’s characteristics under different mapping operators. Extensive numerical experiments, involving both synthetic and real-world data, verify the superior convergence, robustness, and better accuracy of the VBIM-ADAA compared to the conventional VBIM. Moreover, numerical experiments demonstrate that the computational time consumed by the ADAA is negligible, which makes it a practical and efficient method for solving ISPs.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 4","pages":"2585-2595"},"PeriodicalIF":4.6,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800773","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}

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Editorial 2024 Reflections and Perspectives for the Year Ahead 社论 2024 对未来一年的思考与展望

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-20 DOI: 10.1109/TAP.2025.3527376

Konstantina S. Nikita

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Eigenmodes of Metafilm Waveguides With Nonlocal Two-Sided Boundary Conditions

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-17 DOI: 10.1109/TAP.2025.3528760

Sergey Bankov;Kirill Klionovski

{"title":"Eigenmodes of Metafilm Waveguides With Nonlocal Two-Sided Boundary Conditions","authors":"Sergey Bankov;Kirill Klionovski","doi":"10.1109/TAP.2025.3528760","DOIUrl":"https://doi.org/10.1109/TAP.2025.3528760","url":null,"abstract":"Metafilm waveguides are used in broad areas of microwave, millimeter-wave, and terahertz applications. In electromagnetic simulations, equivalent boundary conditions represent metafilms for their easy modeling. Nonlocal two-sided boundary conditions of the second order provide adequate modeling accuracy for most metafilms. This article considers a planar metafilm waveguide described by the indicated boundary conditions. It is demonstrated that the classic approach for waveguide eigenmode determination does not provide correct results when applied to the metafilms with nonlocal boundary conditions. The reasons for the incorrectness are some unusual properties of metafilms with nonlocal boundary conditions and the requirement to satisfy a so-called boundary-contact condition for an irregular metafilm, which provides the uniqueness of a boundary-contact problem solution. A novel approach is introduced for correctly determining continuous and discrete eigenmode spectrums in open and shielded waveguides with nonlocal two-sided boundary conditions. An irregular metafilm in a parallel-plate waveguide is considered. It is demonstrated that using the corrected eigenmodes satisfies the boundary-contact condition at the point of irregularity. Some numerical results are presented, demonstrating the calculating accuracy of the proposed analytical approach.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 3","pages":"1630-1639"},"PeriodicalIF":4.6,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553500","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

Theory and Computation of Substructure Characteristic Modes

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-17 DOI: 10.1109/TAP.2025.3528478

Mats Gustafsson;Lukas Jelinek;Miloslav Capek;Johan Lundgren;Kurt Schab

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Full-Duplex Wideband Digital Array With Beamforming and Application to Sum/Difference Pattern Retrodirectivity

IF 4.6 1区计算机科学

IEEE Transactions on Antennas and Propagation Pub Date : 2025-01-13 DOI: 10.1109/TAP.2025.3526894

Alexander T. Don;Maksim V. Kuznetcov;Zain Shafiq;Ronnie Frith;Symon K. Podilchak

{"title":"Full-Duplex Wideband Digital Array With Beamforming and Application to Sum/Difference Pattern Retrodirectivity","authors":"Alexander T. Don;Maksim V. Kuznetcov;Zain Shafiq;Ronnie Frith;Symon K. Podilchak","doi":"10.1109/TAP.2025.3526894","DOIUrl":"https://doi.org/10.1109/TAP.2025.3526894","url":null,"abstract":"A fully digital antenna array is developed and experimentally tested for beamforming, null generation, and in-band full duplex (IBFD) retrodirective beam-steering. The supporting S-band array is compact and comprises co-located transmit and receive stacked patch elements with isolation values of 40 dB. In addition, each element is fed using H-shaped slots and dual-differential integrated couplers and this offers dual-polarized operation as required, while a synchronized software-defined radio (SDR) transceiver network was programmed to apply the needed complex weights and phase conjugation at baseband. Moreover, the system shows proof-of-concept by forming sum and difference patterns and also demonstrates self-steering due to an interrogating signal from the far-field. Results show that the digital retrodirective antenna array (RDA) system can achieve a competitive −5-dB monostatic angular scan range of ±47°, needs no frequency offset to operate, and, offers a 6% matching impedance bandwidth (BW). These wideband features make the RDA capable of common, or reconfigurable, carrier offsets for the incoming and re-radiated beams, and this has also been experimentally demonstrated. To the best knowledge of the authors, no similar digital IBFD antenna, RDA system has been designed, programmed, and tested.","PeriodicalId":13102,"journal":{"name":"IEEE Transactions on Antennas and Propagation","volume":"73 3","pages":"1858-1863"},"PeriodicalIF":4.6,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553499","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