IEEE microwave and wireless technology letters最新文献_第4页

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

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

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

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

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

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

引用次数: 0

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

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

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

引用次数: 0