中国物理B ›› 2017, Vol. 26 ›› Issue (10): 108501-108501.doi: 10.1088/1674-1056/26/10/108501

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Superconducting tunable filter with constant bandwidth using coplanar waveguide resonators

Ying Jiang(蒋莹), Bo Li(李博), Bin Wei(魏斌), Xu-Bo Guo(郭旭波), Bi-Song Cao(曹必松), Li-Nan Jiang(姜立楠)   

  1. 1. State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China;
    2. Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
  • 收稿日期:2017-05-17 修回日期:2017-06-19 出版日期:2017-10-05 发布日期:2017-10-05
  • 通讯作者: Bin Wei E-mail:weibin@mail.tsinghua.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61371009) and the National High Technology Research and Development Program of China (Grant No. 2014AA032703).

Superconducting tunable filter with constant bandwidth using coplanar waveguide resonators

Ying Jiang(蒋莹)1, Bo Li(李博)2, Bin Wei(魏斌)1, Xu-Bo Guo(郭旭波)1, Bi-Song Cao(曹必松)1, Li-Nan Jiang(姜立楠)1   

  1. 1. State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China;
    2. Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
  • Received:2017-05-17 Revised:2017-06-19 Online:2017-10-05 Published:2017-10-05
  • Contact: Bin Wei E-mail:weibin@mail.tsinghua.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61371009) and the National High Technology Research and Development Program of China (Grant No. 2014AA032703).

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摘要： In this paper we propose a two-pole varactor-tuned superconducting filter using coplanar waveguide (CPW) spiral-in-spiral-out (SISO) resonators. Novel internal and external coupling structures are introduced to meet the requirements for a tunable filter with a constant absolute bandwidth. The fabricated device has a frequency tuning range of 14.4% at frequencies ranging from 274.1 MHz to 317.7 MHz, a 3-dB bandwidth of 5.14 ±0.06 MHz, and an insertion loss of 0.08 dB-0.70 dB. The simulated and measured results are in excellent agreement with each other.

关键词: coplanar waveguide (CPW), superconducting, tunable filter, varactor

Abstract: In this paper we propose a two-pole varactor-tuned superconducting filter using coplanar waveguide (CPW) spiral-in-spiral-out (SISO) resonators. Novel internal and external coupling structures are introduced to meet the requirements for a tunable filter with a constant absolute bandwidth. The fabricated device has a frequency tuning range of 14.4% at frequencies ranging from 274.1 MHz to 317.7 MHz, a 3-dB bandwidth of 5.14 ±0.06 MHz, and an insertion loss of 0.08 dB-0.70 dB. The simulated and measured results are in excellent agreement with each other.

Key words: coplanar waveguide (CPW), superconducting, tunable filter, varactor

中图分类号:  (Superconducting devices)

  • 85.25.-j