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Dispersive Impedance Synthesis Approach of Acoustic Wave Ladder Filters and Multiplexers 声波阶梯滤波器和复用器的色散阻抗合成方法
IF 3.4
IEEE microwave and wireless technology letters Pub Date : 2026-10-01 Epub Date: 2026-03-19 DOI: 10.1109/LMWT.2026.3692880
Mario Faura;Santi Cano;Joel Mesas;Jordi Verdú;Pedro de Paco
{"title":"Dispersive Impedance Synthesis Approach of Acoustic Wave Ladder Filters and Multiplexers","authors":"Mario Faura;Santi Cano;Joel Mesas;Jordi Verdú;Pedro de Paco","doi":"10.1109/LMWT.2026.3692880","DOIUrl":"https://doi.org/10.1109/LMWT.2026.3692880","url":null,"abstract":"One of the major obstacles in network synthesis is the challenge of leading with a dispersive impedance at the input/output port, especially in acoustic wave (AW) multiplexers where antennas, switch modules, or active devices exhibit frequency-dependent behavior. This letter introduces an analytical synthesis method that extends conventional formulations of fully canonical (FC) ladder-type filters and multiplexers to accommodate a dispersive source impedance. By iteratively solving rational-function relations, the proposed method accurately captures the effects of dispersive impedance and adjacent-channels loading, if they exist while maintaining numerical stability. Two synthesis examples are presented to demonstrate the method’s effectiveness.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"36 10","pages":"1551-1554"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149133935","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
2027 IEEE Microwave and Wireless Technology Letters (MWTL) Special Topic Issue 2027 IEEE微波与无线技术快报（MWTL）专题版
IF 3.4
IEEE microwave and wireless technology letters Pub Date : 2026-10-01 Epub Date: 2026-10-09 DOI: 10.1109/LMWT.2026.3737353
{"title":"2027 IEEE Microwave and Wireless Technology Letters (MWTL) Special Topic Issue","authors":"","doi":"10.1109/LMWT.2026.3737353","DOIUrl":"https://doi.org/10.1109/LMWT.2026.3737353","url":null,"abstract":"","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"36 10","pages":"1699-1699"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11731751","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149131526","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
A Capacitor-Array-Based Phase Calibration Method for Digital Switched Attenuators 基于电容阵列的数字开关衰减器相位校准方法
IF 3.4
IEEE microwave and wireless technology letters Pub Date : 2026-10-01 Epub Date: 2026-03-04 DOI: 10.1109/LMWT.2026.3688229
Congrui Li;Jiahao Wang;Yan Wang;Lei Zhang
{"title":"A Capacitor-Array-Based Phase Calibration Method for Digital Switched Attenuators","authors":"Congrui Li;Jiahao Wang;Yan Wang;Lei Zhang","doi":"10.1109/LMWT.2026.3688229","DOIUrl":"https://doi.org/10.1109/LMWT.2026.3688229","url":null,"abstract":"This letter presents an effective capacitor-array-based phase calibration method for digital switched attenuators (DSAs) incorporating a tail capacitor, and introduces a compact 6-bit Q-/V-band bidirectional DSA prototype with the phase calibration enabled by capacitor arrays. The prototype exhibits an attenuation range of 31.5 dB with a 0.5-dB step size, where forward S<sub>21</sub> and reverse S<sub>12</sub> responses are nearly identical. Across the entire 42–52-GHz operating band, it achieves an insertion loss of 13 dB. Across the full-operating band, root-mean-square (rms) phase and amplitude errors are reduced from 5.6° to 10.03° and 0.3 to 0.46 dB (without calibration) to 2.8°–3.9° and 0.17–0.22 dB (with calibration), respectively—validating the efficacy of the proposed phase-calibration capacitor array. In addition, the input return loss (S<sub>11</sub>) is less than −20 dB, and the output return loss (S<sub>22</sub>) is less than −12 dB, across the entire operating band. With a core area of 0.12 mm<sup>2</sup>, the DSA features an exceptionally compact footprint compared with state-of-the-art designs.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"36 10","pages":"1591-1594"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149131323","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 Vertical Transition Featuring a 3-D Chamfer-Like Design Based on Fuzz Button for Board-to-Board Interconnects 基于模糊按钮的板对板互连宽带垂直过渡三维倒角设计
IF 3.4
IEEE microwave and wireless technology letters Pub Date : 2026-10-01 Epub Date: 2026-03-05 DOI: 10.1109/LMWT.2026.3685627
Zhuo-Xi Jiang;Xiaohu Wu;Chunwang Gu;Lukui Jin;Kai Wang;Ye Wang
{"title":"Wideband Vertical Transition Featuring a 3-D Chamfer-Like Design Based on Fuzz Button for Board-to-Board Interconnects","authors":"Zhuo-Xi Jiang;Xiaohu Wu;Chunwang Gu;Lukui Jin;Kai Wang;Ye Wang","doi":"10.1109/LMWT.2026.3685627","DOIUrl":"https://doi.org/10.1109/LMWT.2026.3685627","url":null,"abstract":"This letter proposes a wideband vertical transition for multilayer PCBs based on a fuzz button. The discontinuity in the vertical transition is analyzed, and an etched aperture is introduced in the ground plane beneath the connecting pad to compensate for the parasitic capacitance arising from the intentionally oversized pad. This technique extends the concept of chamfering from 2-D microstrip bends to a 3-D chamfer-like design in vertical interconnects. A three-stage transformer is further employed to enhance the impedance matching, enabling the wideband operation from DC to 35 GHz. A back-to-back measurement is conducted for verification, demonstrating a return loss below −10 dB from DC to 33.8 GHz and an insertion loss below 0.5 dB at 30 GHz. The proposed vertical transition offers a promising solution for high-density, removable interconnects in multilayer PCB applications.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"36 10","pages":"1587-1590"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149133827","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 Compact Wilkinson Power Divider Based on Suspended Mushroom Metamaterial 基于悬浮蘑菇超材料的紧凑型威尔金森功率分配器设计
IF 3.4
IEEE microwave and wireless technology letters Pub Date : 2026-10-01 Epub Date: 2026-03-04 DOI: 10.1109/LMWT.2026.3685649
Hanyong Wang;Yongqiang Wang;Kaixue Ma
{"title":"Design of Compact Wilkinson Power Divider Based on Suspended Mushroom Metamaterial","authors":"Hanyong Wang;Yongqiang Wang;Kaixue Ma","doi":"10.1109/LMWT.2026.3685649","DOIUrl":"https://doi.org/10.1109/LMWT.2026.3685649","url":null,"abstract":"This letter presents a compact Wilkinson power divider (WPD) implemented using a suspended mushroom structure. By exploiting the low loss and slow wave characteristics of the proposed unit under two excitation modes, the design simultaneously achieves low transmission loss and compact size. An inverse design approach based on an internal multiport method (IMPM) is introduced for rapid optimization. A 5 GHz prototype was designed, fabricated, and measured. The measured results show an insertion loss of 0.34 dB, an isolation of 24.7 dB, return losses better than 20 dB at all ports, and a 122% 10-dB fractional bandwidth. The core size is <inline-formula> <tex-math>$0.1times 0.1~lambda _{0}$ </tex-math></inline-formula>.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"36 10","pages":"1575-1578"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149131878","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 Synchronously Tunable Dual-Channel Balanced Bandpass Filter Using a Single Tuning Element 使用单个调谐元件的同步可调谐双通道平衡带通滤波器
IF 3.4
IEEE microwave and wireless technology letters Pub Date : 2026-10-01 Epub Date: 2026-03-01 DOI: 10.1109/LMWT.2026.3685693
Ye Liu;Lianwen Deng;Leilei Qiu;Shujiang Zeng;Shengxiang Huang
{"title":"A Synchronously Tunable Dual-Channel Balanced Bandpass Filter Using a Single Tuning Element","authors":"Ye Liu;Lianwen Deng;Leilei Qiu;Shujiang Zeng;Shengxiang Huang","doi":"10.1109/LMWT.2026.3685693","DOIUrl":"https://doi.org/10.1109/LMWT.2026.3685693","url":null,"abstract":"A tunable dual-channel balanced bandpass filter (BPF) that achieves synchronous dual-channel tuning through a single tuning element is presented in this letter. The degenerate TE<sub>011</sub> and TE<sub>101</sub> modes of the cavity are simultaneously tuned by rotating a dielectric cross while maintaining a relatively constant bandwidth. By utilizing the orthogonality of the two modes and the mode-selective excitation of balanced feeding probes under differential-mode (DM) excitation, excellent common-mode (CM) rejection and high interchannel isolation are achieved. The fabricated prototype demonstrates a tuning range from 6.10 to 6.75 GHz, with bandwidth varying from 179.7 to 226 MHz, insertion loss ranging from 0.61 to 0.96 dB, CM suppression higher than 48 dB, and interchannel isolation exceeding 30 dB across the entire tuning range. The proposed design offers a compact solution for tunable dual-channel balanced filters.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"36 10","pages":"1559-1562"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149133510","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
Geometric-Mean De-Embedding: A Heuristic Distributed Method for Precise Characterization of RF HEMTs 几何均值去嵌入：射频hemt精确表征的启发式分布方法
IF 3.4
IEEE microwave and wireless technology letters Pub Date : 2026-10-01 Epub Date: 2026-03-13 DOI: 10.1109/LMWT.2026.3688800
Mohammad Rezaei;Amirhossein Esteghamat;Elison Matioli
{"title":"Geometric-Mean De-Embedding: A Heuristic Distributed Method for Precise Characterization of RF HEMTs","authors":"Mohammad Rezaei;Amirhossein Esteghamat;Elison Matioli","doi":"10.1109/LMWT.2026.3688800","DOIUrl":"https://doi.org/10.1109/LMWT.2026.3688800","url":null,"abstract":"We propose a heuristic combination of conventional lumped de-embedding models [i.e., open–short (OS) and short–open (SO)] that is equivalent to a distributed model. The technique was named geometric-mean de-embedding (GM-DE), as it converges to the geometric mean of the two other methods for the single-port case. This is unlike existing distributed methods, which are often overly complicated, require additional dedicated calibration steps, and therefore have not been adopted in common practice. While lumped de-embedding has remained the mainstream method for more than three decades, our approach provides a practical yet robust pathway toward distributed de-embedding. This is of utmost importance for accurate parameter extraction of RF HEMTs, particularly for the correct estimation of key performance figures like <inline-formula> <tex-math>$f_{max }$ </tex-math></inline-formula>.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"36 10","pages":"1695-1698"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149131321","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 75--105 GHz Symmetric-Cell-Based Distributed Attenuator With Broadband Phase Compensation 带宽带相位补偿的紧凑75—105 GHz对称单元分布式衰减器
IF 3.4
IEEE microwave and wireless technology letters Pub Date : 2026-10-01 Epub Date: 2026-03-04 DOI: 10.1109/LMWT.2026.3684077
Yang Liu;Nengxu Zhu;Jinxin Li;Xuan Li;Zhifu Hu;Meilin He;Keyuan Chen;Fanyi Meng
{"title":"A Compact 75--105 GHz Symmetric-Cell-Based Distributed Attenuator With Broadband Phase Compensation","authors":"Yang Liu;Nengxu Zhu;Jinxin Li;Xuan Li;Zhifu Hu;Meilin He;Keyuan Chen;Fanyi Meng","doi":"10.1109/LMWT.2026.3684077","DOIUrl":"https://doi.org/10.1109/LMWT.2026.3684077","url":null,"abstract":"This letter introduces a compact distributed attenuator with low phase error, employing a novel second-order phase correction (SOPC) technique. In each attenuation unit, two switch transistors are symmetrically distributed at both ends of the transmission line to form a second-order network, effectively compensating phase deviations without extra area overhead. The analysis and design of the attenuator are described. The proposed 5-bit attenuator is fabricated in a 130-nm SiGe BiCMOS process. Measurement results demonstrate that over 75–105 GHz, the attenuator achieves an insertion loss of 3.1–4.6 dB and a 12.8 dB tuning range with 0.4 dB step size. The rms phase error is <2°>2</sup>.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"36 10","pages":"1679-1682"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149131645","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
High Selectivity Superconducting Dual-Band Bandpass Filter Using Degenerate Modes of Capacitively Loaded Double Ring Resonators 利用电容负载双环谐振器简并模式的高选择性超导双带带通滤波器
IF 3.4
IEEE microwave and wireless technology letters Pub Date : 2026-10-01 Epub Date: 2026-03-18 DOI: 10.1109/LMWT.2026.3692131
Xinlei Liu;Zhewang Ma;Baoping Ren;Bingqing Miao
{"title":"High Selectivity Superconducting Dual-Band Bandpass Filter Using Degenerate Modes of Capacitively Loaded Double Ring Resonators","authors":"Xinlei Liu;Zhewang Ma;Baoping Ren;Bingqing Miao","doi":"10.1109/LMWT.2026.3692131","DOIUrl":"https://doi.org/10.1109/LMWT.2026.3692131","url":null,"abstract":"In this letter, a capacitively loaded double ring resonator (CL-DRR) with a pair of degenerate modes is proposed. Compared with conventional dual-mode ring resonators, its size is reduced by 86.5%, and its two modes can be controlled independently even though they are closely neighbored. When the CL-DRRs are coupled in different orientations, distinctive coupling characteristics are obtained, and multiple transmission zeros (TZs) are produced. By using dual-tapped feedlines with a compensation tuning technique, the independent control of the external quality factors of the dual passbands is achieved. A compact dual-band bandpass filter (BPF) with a small center-frequency ratio is designed, realizing independent control of both its center frequencies and bandwidths, together with sharp roll-off passbands due to its multiple TZs. The measured response of the fabricated filter using high-temperature superconducting (HTS) films satisfies the design specifications well and shows very low loss.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"36 10","pages":"1563-1566"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149133413","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 Watt-Level 5.5-GHz GaAs HBT Power Amplifier With Optimized Linearity and Efficiency for UAV and IoT Networks 用于无人机和物联网网络的线性度和效率优化的瓦级5.5 ghz GaAs HBT功率放大器
IF 3.4
IEEE microwave and wireless technology letters Pub Date : 2026-10-01 Epub Date: 2026-03-12 DOI: 10.1109/LMWT.2026.3689378
Zhongyuan Fang;Zhongliang Li;Wenjing Shan;Guixiang Jin;Yi Luo;Hao Huang;Wenbin Wang;Jiawen Wang;Yongjia Li;Qiangji Wang;Weifeng Sun
{"title":"A Watt-Level 5.5-GHz GaAs HBT Power Amplifier With Optimized Linearity and Efficiency for UAV and IoT Networks","authors":"Zhongyuan Fang;Zhongliang Li;Wenjing Shan;Guixiang Jin;Yi Luo;Hao Huang;Wenbin Wang;Jiawen Wang;Yongjia Li;Qiangji Wang;Weifeng Sun","doi":"10.1109/LMWT.2026.3689378","DOIUrl":"https://doi.org/10.1109/LMWT.2026.3689378","url":null,"abstract":"This letter presents a 5.5-GHz GaAs heterojunction-bipolar-transistor (HBT) power amplifier (PA) designed to deliver Watt-level linear output power with optimized linearity and efficiency for unmanned aerial vehicle (UAV) and the Internet-of-Things (IoT) networks. To address the linearity–efficiency tradeoff critical for UAV applications, a systematic interstage linearization strategy is implemented. Here, the adaptive bias is precisely tuned to generate gain compression in the driver stages. That actively cancels the AM–AM expansion of the power stage. Furthermore, a low-loss chip-package co-designed output matching network integrates high-<inline-formula> <tex-math>$Q$ </tex-math></inline-formula> bond-wires with harmonic traps, minimizing passive losses to maximize power-added efficiency (PAE). The proposed PA achieves a gain of > 32.2 dB, <inline-formula> <tex-math>$mathrm{P}_{mathrm {sat}} gt 32$ </tex-math></inline-formula> dBm, peak PAE > 37.1%, <inline-formula> <tex-math>$mathrm{P}_{mathrm {1 dB}} gt 30.5$ </tex-math></inline-formula> dBm, and <inline-formula> <tex-math>$mathrm{PAE}_{mathrm {1 dB}} gt 31$ </tex-math></inline-formula>% across the 5.15–5.825 GHz frequency range. The PA demonstrates 802.11ac MCS9 VHT80 and 802.11ax MCS11 VHT80 modulations at 5.5 GHz. For 802.11ac MCS9 80-MHz 256-QAM signals, the PA achieves 21.9 dBm/9.0% average P<sub>out</sub>/PAE with −35.1-dB rms EVM at 5.5 GHz. For 802.11ax MCS11 80-MHz 1024-QAM signals, the PA achieves 22.7 dBm/9.7% average P<sub>out</sub>/PAE with −43.4-dB rms EVM at 5.5 GHz.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"36 10","pages":"1659-1662"},"PeriodicalIF":3.4,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149133829","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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