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Millimeter-Wave Wireless Data Distribution System Using Polymer Fiber Waveguide 基于聚合物光纤波导的毫米波无线数据分配系统
IEEE microwave and wireless technology letters Pub Date : 2025-04-22 DOI: 10.1109/LMWT.2025.3558224
Yizhang Li;David P. Schaber;Hans H. Brunner;Jan Hesselbarth;Christian Bluemm
{"title":"Millimeter-Wave Wireless Data Distribution System Using Polymer Fiber Waveguide","authors":"Yizhang Li;David P. Schaber;Hans H. Brunner;Jan Hesselbarth;Christian Bluemm","doi":"10.1109/LMWT.2025.3558224","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3558224","url":null,"abstract":"This work presents a wireless data distribution system for operation at millimeter-wave (mm-wave) frequencies. The system aims to avoid gaps in the wireless line-of-sight coverage in areas with otherwise prohibitive shadowing effects caused by obstacles and walls. Dual-polarized polymer dielectric fiber is proposed for low-loss signal distribution over distances of 10 m and more. Multiple directive metal clip antennas can be attached to the polymer fiber to couple a part of the guided wave energy with radiated waves. The given experimental proof uses a data stream conforming to the IEEE 802.11ad WLAN standard in a single 60-GHz frequency band; 6.93 Gbps is transmitted over 10 m of fiber plus 2 m wirelessly at low error vector magnitude (EVM). Furthermore, the possibility to communicate with three clip antennas placed at individual positions along a single fiber is demonstrated.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"1013-1016"},"PeriodicalIF":0.0,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10973775","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 Controllable Dual-Band Bandpass Filter Based on Dual-Mode Metal Plate Coupled Resonator 基于双模金属板耦合谐振器的可控双带带通滤波器设计
IEEE microwave and wireless technology letters Pub Date : 2025-04-22 DOI: 10.1109/LMWT.2025.3554772
Jiayu Rao;Pei Ding;Yang Yu;Lei Zhang;Povilas Vaitukaitis
{"title":"Design of Controllable Dual-Band Bandpass Filter Based on Dual-Mode Metal Plate Coupled Resonator","authors":"Jiayu Rao;Pei Ding;Yang Yu;Lei Zhang;Povilas Vaitukaitis","doi":"10.1109/LMWT.2025.3554772","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3554772","url":null,"abstract":"This article presents a controllable dual-band filter design based on a dual-mode metal plate coupled resonator (DM-MPCR). Both inductive window and cylinder post couplings were adopted to obtain independent inner coupling control. Extra cylinder post was also loaded in the first and last resonators to achieve external coupling control flexibility. Also, beneficial from the mixed-coupling features of DM-MPCR, a novel dual-parallel coupling topology path was formed, which generates multiple transmission zeros (TZs). The designed dual-band filter was fabricated using 3-D metal printing for rapid demonstration. The measured results agreed well with the simulated ones.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"953-956"},"PeriodicalIF":0.0,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A 0.12-nJ/b 20-Mb/s 700-MHz GFSK Transmitter With a Subsampling PLL Employing 8-Bit Class-D DCO 一个0.12 nj /b的20mb /s 700mhz GFSK发射机，带8位d类DCO的子采样锁相环
IEEE microwave and wireless technology letters Pub Date : 2025-04-22 DOI: 10.1109/LMWT.2025.3559352
Rongxing Qin;Fei You;Jing Xu;Zening Nie;Xuequn Zhu;Songbai He
{"title":"A 0.12-nJ/b 20-Mb/s 700-MHz GFSK Transmitter With a Subsampling PLL Employing 8-Bit Class-D DCO","authors":"Rongxing Qin;Fei You;Jing Xu;Zening Nie;Xuequn Zhu;Songbai He","doi":"10.1109/LMWT.2025.3559352","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3559352","url":null,"abstract":"A 700-MHz Gaussian frequency-shift keying (GFSK) transmitter (Tx) for the Internet of Things (IoT) application is presented in this letter. The proposed Tx adopts direct open-loop oscillator modulation to reach 20-Mb/s data rate, overcoming the rate limitations of conventional architectures. To the author’s best knowledge, this is the highest data rate for the GFSK Tx operating in the sub-1-GHz band. A subsampling phase-locked loop (SSPLL) is duty-cycled and activated just before packet transmission. An 8-bit low-power low-phase-noise class-D digitally controlled oscillator (DCO) is employed to achieve high-frequency resolution, thereby enhancing spectral efficiency. Besides, the Tx utilizes an inverter-based push-pull power amplifier (PA) to accomplish high efficiency and full on-chip integration. The Tx operates with a 0.8-V supply voltage except DCO, and the DCO is powered at 0.25 V. Fabricated in 65-nm CMOS, the DCO achieves a phase noise less than −118 dBc/Hz @ 1 MHz, and the proposed Tx achieves an energy efficiency of 0.12-nJ/b for 20-Mb/s data rate.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"1081-1084"},"PeriodicalIF":0.0,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Monolithic D-Mode GaN-Based Buck Converter With Novel Resistor–Capacitor-Multiplexing Dead-Time Adjustment Structure for Envelope-Tracking Power Amplifier Application 一种基于单片d模氮化镓的降压变换器，具有新型的电阻-电容复用死区调整结构，用于包络跟踪功率放大器
IEEE microwave and wireless technology letters Pub Date : 2025-04-22 DOI: 10.1109/LMWT.2025.3555257
Chunyue Bo;Chenhao Li;Xiaoyu Hu;Xiangcong Zhai;Ke Wei;Xinyu Liu;Weijun Luo
{"title":"A Monolithic D-Mode GaN-Based Buck Converter With Novel Resistor–Capacitor-Multiplexing Dead-Time Adjustment Structure for Envelope-Tracking Power Amplifier Application","authors":"Chunyue Bo;Chenhao Li;Xiaoyu Hu;Xiangcong Zhai;Ke Wei;Xinyu Liu;Weijun Luo","doi":"10.1109/LMWT.2025.3555257","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3555257","url":null,"abstract":"This letter reports a monolithic high-efficiency buck converter using all depletion-mode (d-mode) gallium nitride (GaN) HEMTs which integrates a dead-time generating driving circuit and a power stage. A novel resistor-capacitor-multiplexing (RCM) structure is proposed, where the resistor functions for both pull-up and dead-time adjustment, and the capacitor is used for both level-shifting and dead-time adjustment. Therefore, dead-time can be adjusted without introducing additional paralleled capacitors, enabling the RCM structure to sharpen the rising and falling edge of the power stage’s gate signal, thereby improving both switching frequency and efficiency. This buck achieves a peak efficiency of 90.7%, delivering an output power reaching 11.6 W at a switching frequency of 112.5 MHz. A power amplifier (PA) is supplied by the proposed circuit serving as an envelope-tracking supply modulator (ETSM) for the verification of envelope-tracking power amplifier(ET-PA). The overall efficiency of the ET-PA was increased by 14.3% compared with the PA with fixed supply voltage. To the best of the authors’ knowledge, this is the first report of a monolithic all-d-mode-GaN-based buck with an integrated dead-time generator.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"1065-1068"},"PeriodicalIF":0.0,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An Ultracompact 6-bit Phase Shifter Using Active Balun Embedded Vector-Sum Core 一种采用有源Balun嵌入式矢量和核的超紧凑6位移相器
IEEE microwave and wireless technology letters Pub Date : 2025-04-21 DOI: 10.1109/LMWT.2025.3558187
Seonjeong Park;Jayol Lee;Kyunghwan Park
{"title":"An Ultracompact 6-bit Phase Shifter Using Active Balun Embedded Vector-Sum Core","authors":"Seonjeong Park;Jayol Lee;Kyunghwan Park","doi":"10.1109/LMWT.2025.3558187","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3558187","url":null,"abstract":"This letter introduces an ultracompact, high-resolution X-band active phase shifter (PS) featuring an active balun embedded vector-sum (VS) circuit. With a compact size of <inline-formula> <tex-math>$0.22~text {mm}^{2}$ </tex-math></inline-formula>, it utilizes a novel structure that integrates the balun within the vector summing circuit, eliminating the need for extra baluns to generate a differential signal. It also employs a small-size ribbon-type inductor for input matching of in-phase (I) and the quadrature-phase (Q) generator. The proposed PS has high accuracy due to both a low IQ error caused by the constant input impedance of the VS circuit regardless of the phase changes and high-resolution digital-to-analog converters (DACs). The chip is manufactured using a 65-nm CMOS process, achieving a high phase resolution of 5.625° and exhibiting low root-mean-square (rms) phase and gain errors of less than 1.14° and 0.34 dB within 7.15–8.9 GHz. It demonstrates a peak gain of −1.3 dB and has a power consumption of 10.38 mW.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"1025-1028"},"PeriodicalIF":0.0,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Compact W-Band Waveguide Lowpass Filter With Sharp Cutoff Skirt and Wide Stopband 一种紧凑的w波段波导低通滤波器，具有锐利的截止裙边和宽阻带
IEEE microwave and wireless technology letters Pub Date : 2025-04-18 DOI: 10.1109/LMWT.2025.3556847
Yinian Feng;Bo Zhang;Zhongqian Niu;Yong Fan;Kai-Da Xu
{"title":"A Compact W-Band Waveguide Lowpass Filter With Sharp Cutoff Skirt and Wide Stopband","authors":"Yinian Feng;Bo Zhang;Zhongqian Niu;Yong Fan;Kai-Da Xu","doi":"10.1109/LMWT.2025.3556847","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3556847","url":null,"abstract":"In this letter, a low-loss W-band waveguide lowpass filter (LPF) is proposed with improved frequency selectivity, wide stopband, and compact size. The novel design is capable of achieving a sharp cutoff skirt by introducing transmission zeros (TZs), which are obtained by exciting the TM<sub>110</sub> mode. The bandwidth and TZ’s positions can be controlled flexibly through adjusting the size of resonators and the offset of coupling slots, respectively. Moreover, by controlling the frequency of higher order modes, namely, the harmonic staggered technique, a wide spurious-free frequency response is realized. For demonstration, the proposed W-band LPF is fabricated by computer numerical control (CNC) milling technology, and the measured results show the lowest insertion loss is 0.25 dB, and the 50-dB stopband rejection is achieved from 92 to 210 GHz.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"949-952"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Wideband 3-D Bandpass Frequency Selective Surface With High Selectivity and Angular Stability 具有高选择性和角稳定性的宽带三维带通频率选择表面
IEEE microwave and wireless technology letters Pub Date : 2025-04-18 DOI: 10.1109/LMWT.2025.3557418
Yuchen Yan;Weiwei Wu;Yuhong Ma;Jingjian Huang;Naichang Yuan
{"title":"Wideband 3-D Bandpass Frequency Selective Surface With High Selectivity and Angular Stability","authors":"Yuchen Yan;Weiwei Wu;Yuhong Ma;Jingjian Huang;Naichang Yuan","doi":"10.1109/LMWT.2025.3557418","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3557418","url":null,"abstract":"This letter introduces a novel wideband bandpass frequency selective surface (FSS) based on 3-D slotline structures, which exhibits excellent selectivity and angular stability. The proposed FSS comprises orthogonally arranged 3-D periodic printed circuit boards (PCBs) etched with slotline structures. By simultaneously loading an inductive strip and a series <italic>LC</i> structure based on interdigital capacitors at the center of the open-circuit slotline, a third-order filtering response with a controllable high-frequency transmission zero (TZ) is formed. In addition, a stepped-impedance short-circuited slotline is introduced to generate a controllable low-frequency TZ to further improve the passband selectivity. The working principle is elucidated through a detailed analysis employing equivalent circuit models (ECMs). Furthermore, to confirm the design concept, an FSS prototype is manufactured and measured.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"969-972"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Robust Large-Scale Coupling Matrix Reconfiguration via Approximate Cayley Transform 基于近似Cayley变换的鲁棒大尺度耦合矩阵重构
IEEE microwave and wireless technology letters Pub Date : 2025-04-18 DOI: 10.1109/LMWT.2025.3558284
Hao Qian;Yingxiang Xu
{"title":"Robust Large-Scale Coupling Matrix Reconfiguration via Approximate Cayley Transform","authors":"Hao Qian;Yingxiang Xu","doi":"10.1109/LMWT.2025.3558284","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3558284","url":null,"abstract":"This letter proposes an optimization method based on the Cayley transform to solve large-scale filter coupling matrix (CM) reconfiguration problems. The method can significantly improve computational efficiency and initial guess robustness for high-order filter problems. Especially, for multiport filters, a two-stage optimization strategy is designed to further improve robustness, which can also be applied to other methods based on orthogonality constraints. Numerical experiments demonstrate the new method’s advantages over existing approaches.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"941-944"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Shape Estimation and Pattern Correction of Flexible Phased Arrays Using Local Curvature Measurements 基于局部曲率测量的柔性相控阵形状估计与方向图校正
IEEE microwave and wireless technology letters Pub Date : 2025-04-18 DOI: 10.1109/LMWT.2025.3556860
Yair Dashevsky;Matan Gal-Katziri
{"title":"Shape Estimation and Pattern Correction of Flexible Phased Arrays Using Local Curvature Measurements","authors":"Yair Dashevsky;Matan Gal-Katziri","doi":"10.1109/LMWT.2025.3556860","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3556860","url":null,"abstract":"This work presents a general method to estimate the unknown shapes of mechanically flexible phased arrays using strain gauge-based curvature measurements. Such information is crucial to resolve the positions and orientations of the radiators and perform effective beamforming. The procedure is feedback-free, insensitive to electromagnetic interference, and provides a low-frequency modality of shape information. While not limited to a specific size or frequency of operation, this method is demonstrated using a 20-cm, <inline-formula> <tex-math>$1times 8$ </tex-math></inline-formula> phased array operating at 6 GHz, achieving shape reconstruction errors of <inline-formula> <tex-math>$approx 0.052lambda $ </tex-math></inline-formula> for singly, doubly, and triply bent arrays with curvature radii of less than 3.5 cm. Moreover, we illustrate how the shape information can be utilized to correct the beam pattern of a flexible array and enable beamforming and beam-steering even under severe deformations.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 6","pages":"916-919"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144299318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
HEMTs With Side-Source-Via for Optimizing the Performance and Size of High-Power Amplifiers 用于优化高功率放大器性能和尺寸的侧源通径hemt
IEEE microwave and wireless technology letters Pub Date : 2025-04-18 DOI: 10.1109/LMWT.2025.3555672
Erdem Aras;Emirhan Urfalı;Bayram Bütün;Ekmel Ozbay;Abdullah Atalar
{"title":"HEMTs With Side-Source-Via for Optimizing the Performance and Size of High-Power Amplifiers","authors":"Erdem Aras;Emirhan Urfalı;Bayram Bütün;Ekmel Ozbay;Abdullah Atalar","doi":"10.1109/LMWT.2025.3555672","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3555672","url":null,"abstract":"Back-via positioning of a gallium nitride (GaN)-on-silicon carbide (SiC) HEMT is studied to optimize RF performance and area utilization. Placing a back-via for every individual source achieves the best RF performance but results in a large area and an inconvenient aspect ratio. If only two back-vias are used at the outer sources, the increased source inductance reduces the performance. Positioning the source-vias at the gate side of HEMT side-source-via (SSV) results in a smaller source inductance and a more favorable aspect ratio. A three-stage monolithic microwave integrated circuit (MMIC) is designed using SSV HEMTs with a 0.25-<inline-formula> <tex-math>$mu $ </tex-math></inline-formula>m GaN-on-SiC process. The design achieves over 45 W of output power with a typical power-added efficiency of 40% across the operational frequency range of 8–12.5 GHz.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"1061-1064"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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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