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A New Filtering Patch Crossover With Improved Stopband Rejection Range and Reduced Size 一种改进阻带抑制范围和减小尺寸的滤波贴片交叉器
IEEE microwave and wireless technology letters Pub Date : 2025-04-29 DOI: 10.1109/LMWT.2025.3562170
Xin Zhou;Gang Zhang;Chaoyu Jiang;Zhuowei Zhang;Kam-Weng Tam
{"title":"A New Filtering Patch Crossover With Improved Stopband Rejection Range and Reduced Size","authors":"Xin Zhou;Gang Zhang;Chaoyu Jiang;Zhuowei Zhang;Kam-Weng Tam","doi":"10.1109/LMWT.2025.3562170","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3562170","url":null,"abstract":"This letter presents a new and straightforward design method for a patch filtering crossover that features an improved stopband performance and reduced size. A square patch with orthogonal mode TM<sub>10</sub> and TM<sub>01</sub> resonances is positioned at the intersection, while four half-mode patches with half-TM<sub>10</sub> mode resonances are arranged around the square patch. Isolation between channels is achieved through mode cancellation. Due to the unique excitation of the half-mode patch and the interweaving of spurious modes, the −20-dB stopband range has been extended to <inline-formula> <tex-math>$2.98f_{0}$ </tex-math></inline-formula>. A prototype has been designed, fabricated, and measured to validate the proposal, demonstrating good consistency between the simulated and measured results.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"985-988"},"PeriodicalIF":0.0,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581551","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
Design of a High-Efficiency Extended Continuous-Mode Inverse Class-GF Power Amplifier With Enhanced Bandwidth 增强带宽的高效扩展连续模逆gf类功率放大器的设计
IEEE microwave and wireless technology letters Pub Date : 2025-04-29 DOI: 10.1109/LMWT.2025.3559999
Zhenghua Wei;Qiang Liu;Guangxing Du;Guolin Li;Wang Liu
{"title":"Design of a High-Efficiency Extended Continuous-Mode Inverse Class-GF Power Amplifier With Enhanced Bandwidth","authors":"Zhenghua Wei;Qiang Liu;Guangxing Du;Guolin Li;Wang Liu","doi":"10.1109/LMWT.2025.3559999","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3559999","url":null,"abstract":"This letter provides an extended continuous-mode inverse class-GF (ECCGF<sup>−1</sup>) concise theory for the design of a high-efficiency power amplifier (PA) with enhanced bandwidth. Compared with the typical continuous-mode inverse class-GF (CCGF<sup>−1</sup>), a broader design space considering input nonlinearity is explored by simplified formulas based on the harmonic components of the drain current in class-GF<sup>−1</sup>. Moreover, the problem of current overshoot can be alleviated in ECCGF<sup>−1</sup>. For verification, a prototype is designed and fabricated by using a 10-W GaN HEMT device. The measured results show that the output power of 39.8–42.2 dBm, drain efficiency (DE) of 61%–78.6%, and gain of 9.8–12.2 dB are achieved over the relative bandwidth (RBW) of 136.8% from 0.6 to 3.2 GHz. In contrast with the other types of PA, the design exhibits a wider bandwidth and comparable efficiency.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"1041-1044"},"PeriodicalIF":0.0,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581562","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
Multiangle Complexity-Reduced Digital Predistortion for 5G/6G Massive MIMO Beamforming Transmitters 5G/6G大规模MIMO波束形成发射机多角度复杂性降低数字预失真
IEEE microwave and wireless technology letters Pub Date : 2025-04-29 DOI: 10.1109/LMWT.2025.3560633
Zehao Chen;Cuiping Yu;Ke Tang;Hao Li;Feifei Li;Xunnan Zhang;Yuanan Liu
{"title":"Multiangle Complexity-Reduced Digital Predistortion for 5G/6G Massive MIMO Beamforming Transmitters","authors":"Zehao Chen;Cuiping Yu;Ke Tang;Hao Li;Feifei Li;Xunnan Zhang;Yuanan Liu","doi":"10.1109/LMWT.2025.3560633","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3560633","url":null,"abstract":"This letter presents a multiangle digital predistortion (DPD) method for linearizing 5G/6G massive multiple-input–multiple-output (mMIMO) beamforming transmitters. The cascade structure composed of a main box and the subbox tuning network is applied to linearize the main beam and all power amplifiers (PAs). The main box is a proposed improved full basis-propagating selection (IFBPS) DPD model with low complexity and accurate modeling properties. The subbox tuning network can linearize the PAs by several heterogeneous DPDs corresponding to the clustering categories based on the threshold decision results. The measurements were carried out on the laboratory-made PAs based on a single-user two-stream and four-chain MIMO system. Compared with the state-of-the-art DPDs, the results show that the proposed method can improve linearization performance with lower complexity and keep the multiangle linearity of systems without updating the coefficients in real time.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"1077-1080"},"PeriodicalIF":0.0,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581519","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 K-Band Quartz Glass Absorptive Bandpass Filter With On-Chip Power-Divider-Like Architecture 一种k波段石英玻璃吸收带通滤波器，具有片上功率分压器结构
IEEE microwave and wireless technology letters Pub Date : 2025-04-29 DOI: 10.1109/LMWT.2025.3562586
Mingye Fu;Qianyin Xiang;Dinghong Jia;Quanyuan Feng
{"title":"A K-Band Quartz Glass Absorptive Bandpass Filter With On-Chip Power-Divider-Like Architecture","authors":"Mingye Fu;Qianyin Xiang;Dinghong Jia;Quanyuan Feng","doi":"10.1109/LMWT.2025.3562586","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3562586","url":null,"abstract":"In this letter, a novel integrated absorptive bandpass filter based on two-paths architecture with on chip power-divider-like three-port networks and filtering cores is presented. An imaginary impedance element is added in the middle of the absorptive resistor network for mitigating the common mode reflected waves in the stopband, and wideband reflection loss in the stopband is achieved. A quartz glass bandpass absorptive filter is designed and fabricated, with a die size of <inline-formula> <tex-math>$6.65 times 4.89$ </tex-math></inline-formula>mm. Measurement shows the filter is centered at 21.5 GHz with a 3-dB bandwidth (BW) of 3.3 GHz, an insertion loss (IL) of 1.8dB, and a wideband absorptive response from dc to 40 GHz.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"961-964"},"PeriodicalIF":0.0,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581521","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
Design of a Flexible BPF Using Coaxial Open-Loop Dumbbell Branch Defected Conductor Structures 基于同轴开环哑铃支路缺陷导体结构的柔性BPF设计
IEEE microwave and wireless technology letters Pub Date : 2025-04-29 DOI: 10.1109/LMWT.2025.3557406
Yunan Han;Mengyao Cai;Jin Xu;Chunyue Cheng
{"title":"Design of a Flexible BPF Using Coaxial Open-Loop Dumbbell Branch Defected Conductor Structures","authors":"Yunan Han;Mengyao Cai;Jin Xu;Chunyue Cheng","doi":"10.1109/LMWT.2025.3557406","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3557406","url":null,"abstract":"This letter introduces a flexible bandpass filter (BPF) that employs a coaxial structure, consisting of an inner substrate, an inner conductor featuring open-loop dumbbell-shaped defects, an outer conductor with a loop-shaped defect gap, and a transmission dielectric situated between the two conductors. For fabrication, the inner and outer defective conductor structures are manufactured using flexible printed circuit board (FPCB) technology and assembled to form the BPF with a diameter of 3.42 mm and a length of 80 mm for three cascaded resonators. Simulation and measurement results indicate that the insertion loss within the passband of 2.4–4.0 GHz is less than 1 dB, with a rejection of more than 20 dB below 1.2 GHz and above 4.6GHz.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"965-968"},"PeriodicalIF":0.0,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581653","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
Time-Multiplexed Beam-Steering Antenna Arrays for Extended-Coverage RF Powering of Multiple CMOS Brain Implants 多CMOS脑植入物扩展覆盖射频供电的时复用波束导向天线阵列
IEEE microwave and wireless technology letters Pub Date : 2025-04-28 DOI: 10.1109/LMWT.2025.3559017
Mohammad Abdolrazzaghi;Roman Genov;George V. Eleftheriades
{"title":"Time-Multiplexed Beam-Steering Antenna Arrays for Extended-Coverage RF Powering of Multiple CMOS Brain Implants","authors":"Mohammad Abdolrazzaghi;Roman Genov;George V. Eleftheriades","doi":"10.1109/LMWT.2025.3559017","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3559017","url":null,"abstract":"This letter introduces a wireless powering system for multiple implantable devices located across a wide region of the human brain, addressing the spatial coverage challenges in traditional powering methods. We present an RF phased-array time-multiplexing technique that extends the powering coverage to as far as one hemisphere. The transmitter (TX) array is designed with optimal surface currents at 915 MHz to reach and beam-steer deep brain tissue. With transmitting 1 W, this method ensures safe and consistent power delivery over 18-cm lateral span and provides at least <inline-formula> <tex-math>$250~mu $ </tex-math></inline-formula>W to 6-cm deep receiver (RX) implants. In addition, we developed a dynamically biased 65-nm CMOS rectifier, featuring peak power conversion efficiency (PCE) of 72.6% at −2 dBm input power. The integration of phased-array multiplexing and an efficient CMOS rectifier offers a pathway toward arrays of smaller, battery-free neurostimulation implants, capable of simultaneous operation under stringent safety requirements and limited wearable power source size.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 6","pages":"908-911"},"PeriodicalIF":0.0,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144299258","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
Miniaturized IPD Filter With Multiple Flexible Transmission Zeros and High Attenuation 具有多个灵活传输零点和高衰减的小型化IPD滤波器
IEEE microwave and wireless technology letters Pub Date : 2025-04-28 DOI: 10.1109/LMWT.2025.3561157
Lin Gu;Xinyu Zhou;Yuandan Dong
{"title":"Miniaturized IPD Filter With Multiple Flexible Transmission Zeros and High Attenuation","authors":"Lin Gu;Xinyu Zhou;Yuandan Dong","doi":"10.1109/LMWT.2025.3561157","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3561157","url":null,"abstract":"In this letter, a miniaturized integrated passive device (IPD) bandpass filter (BPF) with multiple flexibly controllable transmission zeros (TZs), high attenuation, and low loss is proposed. The proposed novel <inline-formula> <tex-math>$pi $ </tex-math></inline-formula>-type filtering unit incorporates dual <italic>LC</i> series resonant circuits that allow precise placement of two TZs, enhancing the BPF’s selectivity and expanding the stopband bandwidth. Since the branches generating TZs are not the main energy paths, adding multiple TZs causes minimal loss. A three-stage BPF, based on this <inline-formula> <tex-math>$pi $ </tex-math></inline-formula>-type filtering unit, demonstrates high selectivity and attenuation by introducing three TZs on each side of the passband. At the same time, it possesses the advantage of low loss. Manufactured using the GaAs-based IPD technology, the filter exhibits excellent agreement between the simulated and measured results, showcasing its potential for applications requiring ultraminiaturization and high performance in wireless communication systems.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"989-992"},"PeriodicalIF":0.0,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581527","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 5-GHz Fractional-N Reference-Sampling PLL With Voltage-Averaging Fractional Phase Detector Achieving an Integer-N-Level Phase Noise 带平均电压分数阶鉴相器的5 ghz分数阶参考采样锁相环实现整数n级相位噪声
IEEE microwave and wireless technology letters Pub Date : 2025-04-28 DOI: 10.1109/LMWT.2025.3557230
Yanlong Zhang;Xiaoyu Yang;Hong Liao;Yan Wang;Guohe Zhang;Li Geng
{"title":"A 5-GHz Fractional-N Reference-Sampling PLL With Voltage-Averaging Fractional Phase Detector Achieving an Integer-N-Level Phase Noise","authors":"Yanlong Zhang;Xiaoyu Yang;Hong Liao;Yan Wang;Guohe Zhang;Li Geng","doi":"10.1109/LMWT.2025.3557230","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3557230","url":null,"abstract":"A fractional phase detector (PD) architecture that can significantly reduce the quantization error of a fractional-<italic>N</i> phase-locked loop (PLL) is presented. It achieves instantaneous fractional phase detection by spatial averaging in the voltage domain through an array of reference-sampling PD (RSPD) cells. With this fractional PD, a prototype 5-GHz fractional-<italic>N</i> RSPLL is implemented in a 65-nm CMOS process. Measurement results show that the in-band and out-of-band phase noises are reduced by 21 and 33 dB, respectively, leading to a significant reduction of the integrated rms jitter from 6.35 ps to 456 fs, almost the same as that at the integer-<italic>N</i> mode (442 fs).","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"1069-1072"},"PeriodicalIF":0.0,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581479","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 Broadband Active Dual-Component Magnetic Probe for Near-Field Measurement 一种用于近场测量的宽带有源双分量磁探头
IEEE microwave and wireless technology letters Pub Date : 2025-04-28 DOI: 10.1109/LMWT.2025.3556668
Rong Zhou;Hainan Bai;Lei Wang;Zhangming Zhu
{"title":"A Broadband Active Dual-Component Magnetic Probe for Near-Field Measurement","authors":"Rong Zhou;Hainan Bai;Lei Wang;Zhangming Zhu","doi":"10.1109/LMWT.2025.3556668","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3556668","url":null,"abstract":"This work first presents a broadband active dual-component magnetic probe with high sensitivity for near-field measurements. The proposed active magnetic probe is mainly composed of two orthogonal short-circuit loops as signal receiving part, a pair of strip lines as signal transmission part, two low-noise amplifiers (LNAs) as signal enhancement part, and a pair of subminiature version A (SMA) connectors as signal output part. Note that two orthogonal short-circuit loops are used to simultaneously sense two magnetic-field components in different directions and improve detection efficiency. Moreover, a pair of broadband LNAs are integrated into the probe to enhance detection sensitivity. Finally, in order to verify the effectiveness of the design, the proposed active magnetic probe is manufactured on a four-layer printed circuit board (PCB) and characterized by a near-field test system. Measurement results demonstrate that the proposed active magnetic probe can not only measure two orthogonal magnetic components simultaneously but also has high detection sensitivity and wide working bandwidth from 0.3 to 20 GHz.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"1097-1100"},"PeriodicalIF":0.0,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581523","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
Compact Diplexer With Wide Stopband Based on Stacked Dual-Mode and Single-Mode SIW Cavities 基于堆叠双模和单模SIW腔的宽阻带紧凑型双工器
IEEE microwave and wireless technology letters Pub Date : 2025-04-28 DOI: 10.1109/LMWT.2025.3562591
Ziyu Zhou;Gang Dong;Xinqing Lei;Zhangming Zhu
{"title":"Compact Diplexer With Wide Stopband Based on Stacked Dual-Mode and Single-Mode SIW Cavities","authors":"Ziyu Zhou;Gang Dong;Xinqing Lei;Zhangming Zhu","doi":"10.1109/LMWT.2025.3562591","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3562591","url":null,"abstract":"This letter proposes a compact diplexer with a wide stopband based on stacked substrate-integrated waveguide (SIW) cavities. By vertically stacking the common dual-mode resonator (DMR) with multiple single-mode resonators (SMRs), the design achieves flexible bandwidth control for both channels while maintaining compactness. The proposed diplexer achieves enhanced wide-stopband performance through strategic suppression of TE<sub>102</sub>, TE<sub>103</sub>/TE<sub>301</sub>, TE<sub>302</sub>, and TE<sub>303</sub> modes in SMRs. A third-order diplexer is fabricated with a size of <inline-formula> <tex-math>$1.02lambda _{g}^{2}$ </tex-math></inline-formula>, extending the stopband up to <inline-formula> <tex-math>$3.57~f_{1}$ </tex-math></inline-formula> with a better than 20-dB rejection level.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"977-980"},"PeriodicalIF":0.0,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581543","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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