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A 232–282 GHz Frequency Quadrupler in 130-nm SiGe HBT SG13G3Cu Technology 一种采用130纳米SiGe HBT SG13G3Cu技术的232-282 GHz频率四倍器
IEEE microwave and wireless technology letters Pub Date : 2025-04-28 DOI: 10.1109/LMWT.2025.3557327
Boli Peng;Michael Schröter
{"title":"A 232–282 GHz Frequency Quadrupler in 130-nm SiGe HBT SG13G3Cu Technology","authors":"Boli Peng;Michael Schröter","doi":"10.1109/LMWT.2025.3557327","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3557327","url":null,"abstract":"A 232–282 frequency quadrupler has been designed and fabricated using Leibniz Institute for High Performance Microelectronics (IHP’s) highest performance 130-nm SiGe BiCMOS technology, featuring <inline-formula> <tex-math>$f_{T}$ </tex-math></inline-formula>/<inline-formula> <tex-math>$f_{text {MAX}}$ </tex-math></inline-formula> values of 470/650 GHz. It consists of stacked Gilbert-cell (GC) doublers, with neutralization capacitances in the transconductance pair to enhance conversion gain (CG), and a miniaturized balun structure for the low frequency differential input signal generation. The frequency quadrupler achieves a peak output power of –4.5dBm, corresponding to a 3.5 dB CG at 236 GHz, with a 0.56% dc-to-RF efficiency and a 3 dB bandwidth of 50 GHz ranging from 232 to 282 GHz. This performance is realized with a dc power consumption of only 63 mW and a chip area of 0.49 mm<sup>2</sup>.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"1045-1048"},"PeriodicalIF":0.0,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581517","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 196-to-254-GHz Slot-Array Coupled Detector Using Process-Invariant Pseudo Resistor Technique 基于过程不变伪电阻技术的196 ~ 254 ghz缝阵耦合探测器
IEEE microwave and wireless technology letters Pub Date : 2025-04-24 DOI: 10.1109/LMWT.2025.3558285
Qingfan Zeng;Yiming Yu;Jiacheng Ding;Peilin Lv;Huihua Liu;Yunqiu Wu;Cheng Wang;Qingsong Bai;Shang Ma;Jianhao Hu;Kai Kang
{"title":"A 196-to-254-GHz Slot-Array Coupled Detector Using Process-Invariant Pseudo Resistor Technique","authors":"Qingfan Zeng;Yiming Yu;Jiacheng Ding;Peilin Lv;Huihua Liu;Yunqiu Wu;Cheng Wang;Qingsong Bai;Shang Ma;Jianhao Hu;Kai Kang","doi":"10.1109/LMWT.2025.3558285","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3558285","url":null,"abstract":"This letter presents a compact slot-array coupled terahertz (THz) detector achieving a high baseband responsivity of 10 MV/W. The core circuit of the THz detector is based on the principle of square-law detection and realized by a common-source structure. In order to reduce the impact of process variation, a novel bias scheme for pseudo resistor (PR) is proposed to stabilize the baseband bandwidth. A slot-array coupler is employed to extract the THz signal from waveguide for measurement requirement. Fabricated in a 65-nm CMOS process, the proposed detector demonstrates effective detection from 196 to 254 GHz with 25.8% fractional bandwidth. The measured responsivity and noise equivalent power (NEP) are 1.6 kV/W and 39 pW/Hz<sup>0.5</sup>, respectively. Together with the cascaded baseband amplifier, the maximum baseband responsivity of 10 MV/W is achieved.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"1057-1060"},"PeriodicalIF":0.0,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581553","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
RF-Input Doherty-Like Load-Modulated Balanced Amplifier With Decade Bandwidth Enabled by Novel Broadband 180° Power Divider 采用新型宽带180°功率分配器实现十进带宽的rf输入类多尔蒂负载调制平衡放大器
IEEE microwave and wireless technology letters Pub Date : 2025-04-23 DOI: 10.1109/LMWT.2025.3559761
Pingzhu Gong;Niteesh Bharadwaj Vangipurapu;Jiachen Guo;Kenle Chen
{"title":"RF-Input Doherty-Like Load-Modulated Balanced Amplifier With Decade Bandwidth Enabled by Novel Broadband 180° Power Divider","authors":"Pingzhu Gong;Niteesh Bharadwaj Vangipurapu;Jiachen Guo;Kenle Chen","doi":"10.1109/LMWT.2025.3559761","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3559761","url":null,"abstract":"This letter presents the first demonstration of a decade-bandwidth Doherty-like load-modulated balanced amplifier (DL-LMBA). Leveraging the recently developed signal-flow-based broadband LMBA theory, a frequency-agnostic phase-alignment condition is identified that is critical for ensuring intrinsically broadband load modulation (LM) behavior for DL-LMBA, thereby overcoming longstanding bandwidth limitations in DL-LMBA design. In addition, a reflective-type-phase-shifter-based 180° power divider is proposed for the wideband operation of DL-LMBA. To prove the proposed concept, an ultrawideband RF-input DL-LMBA is developed using GaN technology covering the frequency range from 0.2 to 2 GHz. Experimental results demonstrate an efficiency of 44%–67% for peak output power and 43%–75% for 6 dB output back-off (OBO), respectively.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 6","pages":"860-863"},"PeriodicalIF":0.0,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144299240","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
Theoretical Design of Wideband 3-dB RWG Coupler 宽带3db RWG耦合器的理论设计
IEEE microwave and wireless technology letters Pub Date : 2025-04-23 DOI: 10.1109/LMWT.2025.3559535
Jian-Xin Chen;Xin-Yue Fang;Xu Shi;Wei Qin
{"title":"Theoretical Design of Wideband 3-dB RWG Coupler","authors":"Jian-Xin Chen;Xin-Yue Fang;Xu Shi;Wei Qin","doi":"10.1109/LMWT.2025.3559535","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3559535","url":null,"abstract":"This letter introduces a design of wideband 3-dB ridge waveguide (RGW) coupler, theoretically addressing the issue of different odd- and even-mode cut-off frequencies, not mentioned before in the designs of traditional waveguide (WG) couplers. Accordingly, the working mechanism of the proposed RWG coupler is illustrated in detail based on the parameters’ reversion. The bandwidth (BW) of the coupler can be expanded effectively by optimizing the transition between the RWG and input/output stripline. For verification, the RWG coupler centered at 2.35 GHz is fabricated and measured, and the simulated and measured results with good agreement show the fractional BW (FBW) is more than 50%.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"1009-1012"},"PeriodicalIF":0.0,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581564","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 Demonstration of Multifloating Superconducting Qubits on a 3-D Flip-Chip Platform With TLS Loss Mitigation via Apertures 多漂浮超导量子比特在三维倒装芯片平台上的演示，并通过孔径降低TLS损耗
IEEE microwave and wireless technology letters Pub Date : 2025-04-23 DOI: 10.1109/LMWT.2025.3559221
Zhen Luo;Thomas Mayer;Daniela Zahn;Carla Moran Guizan;Johannes Weber;Simon Lang;Hannes Bender;Luis Schwarzenbach;Lars Nebrich;Rui Pereira;Amelie Hagelauer
{"title":"A Demonstration of Multifloating Superconducting Qubits on a 3-D Flip-Chip Platform With TLS Loss Mitigation via Apertures","authors":"Zhen Luo;Thomas Mayer;Daniela Zahn;Carla Moran Guizan;Johannes Weber;Simon Lang;Hannes Bender;Luis Schwarzenbach;Lars Nebrich;Rui Pereira;Amelie Hagelauer","doi":"10.1109/LMWT.2025.3559221","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3559221","url":null,"abstract":"Flip-chip platforms are among the most promising approaches for scaling up superconducting qubits in quantum computing. This work presents the design, modeling, and analysis of floating transmon qubits implemented on a 3-D flip-chip platform. A major focus during qubit design is addressing coherence challenges caused by two-level system (TLS) losses, particularly from surface interfaces. TLS losses at the metal-air (MA) interface are mitigated by introducing apertures beneath the qubit pads. The aperture size is optimized to balance two key factors: minimizing total TLS loss and ensuring sufficient coupling strength between the transmon and resonator. Subsequently, a packaged 3-D chip comprising 24 floating transmons is demonstrated. The transmission spectrum is measured, with all readout resonators successfully located at their designated positions on the spectrum. Two-tone spectroscopy is demonstrated, enabling precise measurement of the qubit frequency.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 6","pages":"832-835"},"PeriodicalIF":0.0,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10974912","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144299260","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
Compact Wideband HTS Filter With Multiple TZs Using Integrated Shorted-Stub and Slot SSPPs 使用集成短stub和槽SSPPs的多TZs紧凑型宽带HTS滤波器
IEEE microwave and wireless technology letters Pub Date : 2025-04-23 DOI: 10.1109/LMWT.2025.3558859
Baoping Ren;Junjun Zhou;Chuanyun Wang;Jun Li;Xuehui Guan
{"title":"Compact Wideband HTS Filter With Multiple TZs Using Integrated Shorted-Stub and Slot SSPPs","authors":"Baoping Ren;Junjun Zhou;Chuanyun Wang;Jun Li;Xuehui Guan","doi":"10.1109/LMWT.2025.3558859","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3558859","url":null,"abstract":"In this letter, a novel spoof surface plasmon polaritons (SSPPs) unit is proposed by embedding slot into the shorted stub. Based on the newly SSPPs structure, a compact wideband high-temperature superconducting (HTS) filter with fully controllable passband is designed. The upper and lower cutoff frequencies of the filter can be independently adjusted by the heights of shorted stubs and slots. Also, due to the etched slots, the signal interference can be introduced by adding an additional microstrip line. Then, multiple transmission zeros (TZs) are therefore produced and enhance the passband selectivity. Finally, a low-loss filter operating at 1.1–1.6 GHz is designed and fabricated on MgO wafer with deposited YBCO thin films. The measured results agree well with the simulations, validating the proposed SSPPs structure and design method.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"973-976"},"PeriodicalIF":0.0,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581480","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 Dual-Band Injection-Locked Frequency Quadrupler for 5G Multiband Applications 用于5G多频段应用的双频注入锁频四倍器
IEEE microwave and wireless technology letters Pub Date : 2025-04-23 DOI: 10.1109/LMWT.2025.3560698
Kai Li;Zhipeng Wang;Fanyi Meng;Kaixue Ma;Keping Wang
{"title":"A Dual-Band Injection-Locked Frequency Quadrupler for 5G Multiband Applications","authors":"Kai Li;Zhipeng Wang;Fanyi Meng;Kaixue Ma;Keping Wang","doi":"10.1109/LMWT.2025.3560698","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3560698","url":null,"abstract":"This article proposes a 24.2–29-/36.8–44-GHz dual-band injection-locked frequency quadrupler (ILFQ) with high harmonic rejection for 5G multiband applications. By introducing two parallel reconfigurable amplifiers that switch between low-band mode and high-band mode, the proposed ILFQ supports dual-band operation with only one harmonic generator. These reconfigurable amplifiers can also purify and enhance the 4th harmonic of the injection current, thereby widening the locking range and improving the harmonic rejection ration. In addition, an embedded notch filter is designed to further improve harmonic rejection ratio (HRR). Fabricated in a 65-nm CMOS, the proposed ILFQ achieves more than 44.9-/36.3-dBc 1st HRR and more than 35.5-/27.2-dBc 2nd HRR within the locking range of 24.2–29/36.8–44 GHz. The measured maximum dc power consumption is 15.4/16.3 mW in two modes, with a chip area of 0.49 mm<sup>2</sup>.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"1037-1040"},"PeriodicalIF":0.0,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581518","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 Bent Connector Between Two Rectangular Dielectric Waveguides at W-Band w波段两个矩形介质波导之间的弯曲连接器
IEEE microwave and wireless technology letters Pub Date : 2025-04-22 DOI: 10.1109/LMWT.2025.3557785
Hai-Bing Zhan;Xiao-Chun Li;Chang-Sheng Sun;Ken Ning
{"title":"A Bent Connector Between Two Rectangular Dielectric Waveguides at W-Band","authors":"Hai-Bing Zhan;Xiao-Chun Li;Chang-Sheng Sun;Ken Ning","doi":"10.1109/LMWT.2025.3557785","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3557785","url":null,"abstract":"In this letter, a W-band bent connector between two rectangular dielectric waveguides (RDWs) is proposed. The connector is composed of a gap, two ridge waveguides (RWs), two dielectric-filled waveguides (DWs), and two tapered horns (THs). Three connectors with different bend angles are designed and fabricated. The measured frequency ranges (<inline-formula> <tex-math>$vert S_{11}vert lt -10$ </tex-math></inline-formula> dB) of connectors A (180°), B (135°), and C (90°) connecting two RDWs are 86.9–103.8, 86.3–102.2, and 82.1–102.1 GHz, respectively. Within each frequency range, the insertion losses of connectors A–C are 0.35–1.87, 0.25–1.55, and 0.26–1.57 dB, respectively. Compared with previous connectors, the proposed bent connector enables interconnection between two RDWs with different angles.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"1021-1024"},"PeriodicalIF":0.0,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581655","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 Reconfigurable Filtering Circulator/Isolator With Continuously Controllable Center Frequency and Insertion Phase 中心频率和插入相位连续可控的可重构滤波环行/隔离器
IEEE microwave and wireless technology letters Pub Date : 2025-04-22 DOI: 10.1109/LMWT.2025.3557918
Yuhang Ning;Zhihua Wei;Bin Liu;Pei-Ling Chi;Tao Yang
{"title":"A Reconfigurable Filtering Circulator/Isolator With Continuously Controllable Center Frequency and Insertion Phase","authors":"Yuhang Ning;Zhihua Wei;Bin Liu;Pei-Ling Chi;Tao Yang","doi":"10.1109/LMWT.2025.3557918","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3557918","url":null,"abstract":"A reconfigurable filtering circulator/isolator (RFCI) with tunable frequency and insertion phase based on the spatiotemporal modulation (STM) method is presented. The proposed RFCI mainly consists of three parallel resonator <italic>LC</i> tanks cascaded in a delta topology. With one <italic>LC</i> tank located at each port, both the receiver (Rx) and transmitter (Tx) channels exhibit a second-order filtering response. By adding STM signals in the delta topology, a filtering circulator is obtained. Meanwhile, two phase control networks (PCNs) are added at Rx and Tx ports, respectively. By adjusting the PCN, the insertion phase of the path from the antenna (Ant) to Rx and the one from Tx to Ant can be independently controlled while keeping all amplitude responses unchanged. Furthermore, either Rx or Tx can be turned off, thus transforming the proposed circuit into a filtering isolator with a controllable insertion phase based on signal cancellation. It integrates a bandpass filter (BPF), circulator, isolator, and phase shifter (PS) into a single, compact device. A prototype circuit is fabricated and measured for the proof-of-concept demonstration purposes.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 6","pages":"804-807"},"PeriodicalIF":0.0,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144299113","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 Generative Neural Network for Filter Tuning 一种用于滤波器调谐的生成神经网络
IEEE microwave and wireless technology letters Pub Date : 2025-04-22 DOI: 10.1109/LMWT.2025.3557834
Qiangqiang Lin;Jinzhu Zhou;Guozhuang Fan;Yongji Ma
{"title":"A Generative Neural Network for Filter Tuning","authors":"Qiangqiang Lin;Jinzhu Zhou;Guozhuang Fan;Yongji Ma","doi":"10.1109/LMWT.2025.3557834","DOIUrl":"https://doi.org/10.1109/LMWT.2025.3557834","url":null,"abstract":"A generative neural network (GTNN) is presented for microwave filter tuning, consisting of two steps. The first step involves offline modeling, where the physics mechanism of the microwave filter is combined with a shared weight neural network. In the second step, online tuning is performed, and tuning values are generated using a gradient descent method. The experimental results of three different filters illustrate that the GTNN achieves better tuning results, and the tuning value is generated in less than 16 s.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":"35 7","pages":"945-948"},"PeriodicalIF":0.0,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581545","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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