中国物理B ›› 2017, Vol. 26 ›› Issue (10): 108502-108502.doi: 10.1088/1674-1056/26/10/108502

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

High-temperature superconducting filter using self-embedding asymmetric stepped impedance resonator with wide stopband performance and miniaturized size

Dan Wang(王丹), Bin Wei(魏斌), Yong Heng(衡勇), Bi-Song Cao(曹必松)   

  1. 1. State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China;
    2. Beijing Institute of Electronic System Engineering, Beijing 100854, China
  • 收稿日期:2017-04-28 修回日期:2017-06-12 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).

High-temperature superconducting filter using self-embedding asymmetric stepped impedance resonator with wide stopband performance and miniaturized size

Dan Wang(王丹)1, Bin Wei(魏斌)1, Yong Heng(衡勇)2, Bi-Song Cao(曹必松)1   

  1. 1. State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China;
    2. Beijing Institute of Electronic System Engineering, Beijing 100854, China
  • Received:2017-04-28 Revised:2017-06-12 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 study, a novel self-embedding asymmetric stepped impedance resonator (SE-ASIR) topology is proposed. By embedding asymmetric stepped impedance resonators in themselves, circuit sizes of ASIRs can be reduced effectively, while the ability to control spurious modes of ASIRs remains. Therefore, SE-ASIRs are suitable for being used to design filters with wide stopbands and miniaturized sizes. Furthermore, the construction process of the SE-ASIR is described in detail, and an equivalent model of the SE-ASIR is proposed. For demonstration, a high-temperature superconducting bandpass filter centered at 1112 MHz is designed and fabricated. The measured result agrees well with the simulation result and shows that the out-of-band rejection is better than 60 dB up to 4088 MHz, which is about 3.7 times the center frequency. The filter circuit size is 31 mm×13 mm or 0.28 λg×0.12 λg, where λg is the guided wavelength at 1112 MHz.

关键词: high-temperature superconducting, bandpass filter, microstrip filter, wide stopband

Abstract: In this study, a novel self-embedding asymmetric stepped impedance resonator (SE-ASIR) topology is proposed. By embedding asymmetric stepped impedance resonators in themselves, circuit sizes of ASIRs can be reduced effectively, while the ability to control spurious modes of ASIRs remains. Therefore, SE-ASIRs are suitable for being used to design filters with wide stopbands and miniaturized sizes. Furthermore, the construction process of the SE-ASIR is described in detail, and an equivalent model of the SE-ASIR is proposed. For demonstration, a high-temperature superconducting bandpass filter centered at 1112 MHz is designed and fabricated. The measured result agrees well with the simulation result and shows that the out-of-band rejection is better than 60 dB up to 4088 MHz, which is about 3.7 times the center frequency. The filter circuit size is 31 mm×13 mm or 0.28 λg×0.12 λg, where λg is the guided wavelength at 1112 MHz.

Key words: high-temperature superconducting, bandpass filter, microstrip filter, wide stopband

中图分类号:  (Superconducting devices)

  • 85.25.-j