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A compact switchable bandstop filter with dual-band and wideband bandstop functions

Author

Listed:
  • Hang Mei
  • Xiaoying Zuo
  • Mengxin He
  • Yajian Li

Abstract

In this article, a three-state switchable bandstop filter is proposed, which integrates narrowband dual-band bandstop filter (DBSF), tunable DBSF, and wideband bandstop filter (WBSF) into a topology structure through conducting or disconnecting two p-i-n diodes. Adjusting the capacitance value can change the transmission zero (TZ) and achieve tunable stopband bandwidth. The proposed three-state switchable bandstop filters are simulated and measured. Narrowband DBSF has a 30 dB stopband rejection (SR), tunable DBSF has 6 stopband TZs, tunable stopband bandwidth, and WBSF has a relative bandwidth (RB) of 118.1%. Simulation and measurement results are in good agreement. This switchable bandstop filter meets the requirements of compact RF front-end structure and functional integration.

Suggested Citation

  • Hang Mei & Xiaoying Zuo & Mengxin He & Yajian Li, 2025. "A compact switchable bandstop filter with dual-band and wideband bandstop functions," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 39(5), pages 594-606, March.
    • Handle: RePEc:taf:tewaxx:v:39:y:2025:i:5:p:594-606
    DOI: 10.1080/09205071.2025.2465498
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