IEEE Transactions on Microwave Theory and Techniques最新文献

Guest Editorial Special Issue on Emerging Materials and Processing Technologies for RF/Microwave Applications and Wireless Systems 特刊：射频/微波应用和无线系统的新兴材料和加工技术

IF 4.5 1区工程技术

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2025-09-17 DOI: 10.1109/TMTT.2025.3604082

Yang Yang;Ke Wu

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Editorial for the IEEE T-MTT Mini Special Issue on MIKON 2024 IEEE T-MTT迷你特刊对MIKON 2024的评论

IF 4.5 1区工程技术

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2025-09-17 DOI: 10.1109/TMTT.2025.3595220

Michal Mrozowski

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NEMO 2024 Special Issue Guest Editorial NEMO 2024特刊客座编辑

IF 4.5 1区工程技术

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2025-09-17 DOI: 10.1109/TMTT.2025.3596357

Natalia K. Nikolova;Peter H. Aaen

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Corrections to “Linear Hybrid Asymmetrical Load-Modulated Balanced Amplifier With Multiband Reconfigurability and Antenna-VSWR Resilience” 对“具有多频带可重构性和天线- vswr弹性的线性混合非对称负载调制平衡放大器”的修正

IF 4.5 1区工程技术

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2025-09-17 DOI: 10.1109/TMTT.2025.3559914

Jiachen Guo;Yuchen Cao;Kenle Chen

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Guest Editorial Latest Advances on Radar-Based Physiological Sensors and Their Applications 基于雷达的生理传感器及其应用的最新进展

IF 4.5 1区工程技术

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2025-08-15 DOI: 10.1109/TMTT.2025.3592996

Olga Borić-Lubecke;Victor Manuel Lubecke;Chung-Tse Michael Wu;Emanuele Cardillo;Shekh Md. Mahmudul Islam

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Flexible Broadband Rectifying Array Antenna Based on Printed Liquid Metal 基于印刷液态金属的柔性宽带整流阵列天线

IF 4.5 1区工程技术

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2025-07-30 DOI: 10.1109/TMTT.2025.3589591

Zehua Wang;Dongyang Lu;Ruozhou Li;Ying Yu

{"title":"Flexible Broadband Rectifying Array Antenna Based on Printed Liquid Metal","authors":"Zehua Wang;Dongyang Lu;Ruozhou Li;Ying Yu","doi":"10.1109/TMTT.2025.3589591","DOIUrl":"https://doi.org/10.1109/TMTT.2025.3589591","url":null,"abstract":"As an essential component for wireless power transmission and energy harvesting (EH), rectennas have received increasing attention in recent years. This article presents a flexible rectenna design based on a printed liquid metal additive manufacturing process, offering advantages, such as low cost, high reliability, repeatability, and excellent mechanical adaptability. Polydimethylsiloxane (PDMS) is used as the substrate, providing high flexibility and good conformability. The proposed rectenna consists of a Chebyshev-fed linear monopole antenna array and a compact rectifying circuit. The antenna achieves a gain exceeding 7 dBi over the 2–3-GHz frequency range, with a gain of 9.8 dBi at 2.4 GHz and radiation efficiency above 80%. It also exhibits a wide beamwidth, with a half-power beamwidth (HPBW) of 98° in the <italic>H</i>-plane at 3 GHz, allowing for bidirectional radiation. The rectifier shows over 40% efficiency at 0-dBm input power, above 60% at 10 dBm, and retains 28% efficiency at −12 dBm. Finally, the integrated rectenna was evaluated under various conformal conditions, confirming its stable performance.","PeriodicalId":13272,"journal":{"name":"IEEE Transactions on Microwave Theory and Techniques","volume":"73 9","pages":"6001-6008"},"PeriodicalIF":4.5,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Additively Manufactured Broadband Miniaturized Quadrature Coupler and Its Application to 2-D Scanning Broadband Butler Matrix 增材制造宽带小型化正交耦合器及其在二维扫描宽带管家矩阵中的应用

IF 4.5 1区工程技术

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2025-07-22 DOI: 10.1109/TMTT.2025.3587911

Hanqing Ding;Feng Lin;Zhiwei Yin;Yang Yang;Houjun Sun

{"title":"Additively Manufactured Broadband Miniaturized Quadrature Coupler and Its Application to 2-D Scanning Broadband Butler Matrix","authors":"Hanqing Ding;Feng Lin;Zhiwei Yin;Yang Yang;Houjun Sun","doi":"10.1109/TMTT.2025.3587911","DOIUrl":"https://doi.org/10.1109/TMTT.2025.3587911","url":null,"abstract":"This article presents a broadband miniaturization quadrature coupler with good amplitude and phase performance and its application to a 2-D scanning broadband Butler matrix. The coupler comprises two stages of coupled-line couplers and two T-type networks. Cascaded coupled-line couplers achieve wide matching bandwidth. T-type networks achieve good amplitude and phase imbalance performance. The broadband miniaturization coupler is applied to a <inline-formula> <tex-math>$4times 4$ </tex-math></inline-formula> 2-D scanning broadband Butler matrix. The coupler and Butler matrix are realized using the additively manufactured electronics (AMEs) technique. The sizes of the coupler and Butler matrix are <inline-formula> <tex-math>$0.078times 0.057times 0.0058lambda _{mathbf {0}}$ </tex-math></inline-formula> and <inline-formula> <tex-math>$0.13times 0.074times 0.0086lambda _{mathbf {0}}$ </tex-math></inline-formula>, respectively, where <inline-formula> <tex-math>$lambda _{mathbf {0}}$ </tex-math></inline-formula> indicates the free space wavelength at the center frequency. Within <inline-formula> <tex-math>$0.6sim 1.4$ </tex-math></inline-formula> GHz, the measured return loss of coupler exceeds 16.8 dB, and the isolation is better than 19.3 dB. The amplitude and phase imbalances of the coupler are better than 0.34 dB and 2°, respectively. Within <inline-formula> <tex-math>$0.6sim 1.4$ </tex-math></inline-formula> GHz, the measured return loss of Butler matrix exceeds 16.5 dB, and the isolation is better than 15.5 dB. The amplitude and phase imbalances of the coupler are better than 1.8 dB and 7.2°, respectively.","PeriodicalId":13272,"journal":{"name":"IEEE Transactions on Microwave Theory and Techniques","volume":"73 9","pages":"5803-5812"},"PeriodicalIF":4.5,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and Validation of Groundless Uni- and Bi-Directional Electromagnetic Absorbers Using Lossy Metagratings 无基单、双向电磁吸波器的设计与验证

IF 4.5 1区工程技术

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2025-07-15 DOI: 10.1109/TMTT.2025.3576268

Zhen Tan;Jianjia Yi;Jian-Xin Chen;Shah Nawaz Burokur

{"title":"Design and Validation of Groundless Uni- and Bi-Directional Electromagnetic Absorbers Using Lossy Metagratings","authors":"Zhen Tan;Jianjia Yi;Jian-Xin Chen;Shah Nawaz Burokur","doi":"10.1109/TMTT.2025.3576268","DOIUrl":"https://doi.org/10.1109/TMTT.2025.3576268","url":null,"abstract":"In this article, a design methodology for groundless metagrating absorbers is proposed. By strategically arranging sub wavelength microstrip capacitors in series with chip resistors on the upper and lower layers of a dielectric substrate, uni- or bi-directional electromagnetic absorption can be effectively realized at a desired operating frequency. The entire design process is based on a fully analytical derivation, with clear mathematical theory, and is applicable across a broad range of frequencies, including microwave, millimeter-wave, and even terahertz bands. The full-wave simulation results of the proposed uni- and bi-directional absorbers show excellent agreement with theoretical calculations, validating the efficacy of the methodology. Additionally, for the bi-directional absorber, a prototype operating around 10 GHz is fabricated and measured, with experimental results aligning well with the simulated ones. Compared to other grounded metamaterial/metasurface absorbers, the proposed groundless structure offers adaptability in terms of conformability, making it more suitable for practical applications. This enhanced conformability suggests a promising potential for the future application of external electromagnetic stealth and internal electromagnetic compatibility.","PeriodicalId":13272,"journal":{"name":"IEEE Transactions on Microwave Theory and Techniques","volume":"73 9","pages":"5748-5764"},"PeriodicalIF":4.5,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Robust Numerical Solver for Nonlinear Semiconductor Problems 非线性半导体问题的鲁棒数值求解器

IF 4.5 1区工程技术

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2025-07-08 DOI: 10.1109/TMTT.2025.3576061

Mario Kupresak;Bruno Eckmann;Johannes Hoffmann;Michael Baumann;Philippe Peter;Jasmin Smajic;Juerg Leuthold

{"title":"Robust Numerical Solver for Nonlinear Semiconductor Problems","authors":"Mario Kupresak;Bruno Eckmann;Johannes Hoffmann;Michael Baumann;Philippe Peter;Jasmin Smajic;Juerg Leuthold","doi":"10.1109/TMTT.2025.3576061","DOIUrl":"https://doi.org/10.1109/TMTT.2025.3576061","url":null,"abstract":"In this work, we develop a numerical solver, efficiently and robustly treating highly nonlinear semiconductor device problems. Beyond the capabilities of commercial tools, the solver can compute the time-domain capacitance and the spectrum of the device current. The solver is based on the finite element method (FEM) and employs the successive under-relaxation scheme. Its capability has been assessed and validated in a study of an axisymmetric metal-oxide–semiconductor (MOS) structure, presenting an archetypal scanning microwave microscopy (SMM) calibration sample, with both <italic>n</i>- and <italic>p</i>-doped semiconductors, including different excitation sources. Excellent agreement was obtained, when testing the tool against features of a commercial tool. By computing the capacitance for the applied low-frequency (LF) bias, combined with a high-frequency (HF) probe signal, the spectrum of the current flowing in the structure was evaluated, revealing mix-product components. This allowed us to verify the solver against measurements, resulting in a very good agreement.","PeriodicalId":13272,"journal":{"name":"IEEE Transactions on Microwave Theory and Techniques","volume":"73 9","pages":"6051-6058"},"PeriodicalIF":4.5,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Automotive In-Cabin Radar Uncovered: The Essential Guide to Choose the Perfect Sensing Technology for Your Vehicle 汽车舱内雷达揭露：为您的车辆选择完美传感技术的基本指南

IF 4.5 1区工程技术

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2025-07-08 DOI: 10.1109/TMTT.2025.3580167

Joan Gemio Valero;Giselle González-López;Albert Alcàsser Expósito;Laia Vilalta Estrada;Francisco Jesus Lobo

{"title":"Automotive In-Cabin Radar Uncovered: The Essential Guide to Choose the Perfect Sensing Technology for Your Vehicle","authors":"Joan Gemio Valero;Giselle González-López;Albert Alcàsser Expósito;Laia Vilalta Estrada;Francisco Jesus Lobo","doi":"10.1109/TMTT.2025.3580167","DOIUrl":"https://doi.org/10.1109/TMTT.2025.3580167","url":null,"abstract":"In-cabin monitoring systems (iCM) are transforming the automotive industry’s approach to safety and occupant well-being. Among the various sensing technologies, radar has emerged as a highly effective solution due to its robustness in challenging conditions such as poor lighting or obstructed view. This article reviews the state-of-the-art radar technologies used for critical automotive safety applications, including child presence detection (CPD), seat belt reminder (SBR), intrusion detection systems (IDS), occupant out-of-position (OOP) analysis, and vital sign monitoring. With emerging regulatory requirements, such as the European New Car Assessment Program (Euro NCAP) standards mandating CPD and SBR, radar technology provides a scalable, cost-effective solution for automakers. This article examines the underlying radar principles, system architectures, capabilities, and limitations of the three main used radar technologies [Doppler, frequency modulated continuous wave (FMCW), and ultrawideband (UWB)] for iCM, addressing both technical challenges and opportunities for enhancing vehicle safety.","PeriodicalId":13272,"journal":{"name":"IEEE Transactions on Microwave Theory and Techniques","volume":"73 8","pages":"4386-4401"},"PeriodicalIF":4.5,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0