ETRI Journal

  • 제41권1호
  • /
  • Pages.117-123
  • /
  • 2019
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  • 1225-6463(pISSN)
  • /
  • 2233-7326(eISSN)
한국전자통신연구원 (Electronics and Telecommunications Research Institute)
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Compact tri-wideband bandpass filter with multiple transmission zeros

  • Xiong, Yang (The Southwest China Institute of Electronic Technology) ;
  • Wang, LiTian (College of Electronic Information and Optical Engineering, Nankai University) ;
  • Gong, Li (College of Electronic Information and Optical Engineering, Nankai University) ;
  • He, KaiYong (College of Electronic Information and Optical Engineering, Nankai University) ;
  • Zhang, Man (College of Electronic Information and Optical Engineering, Nankai University) ;
  • Li, Hui (College of Electronic Information and Optical Engineering, Nankai University) ;
  • Zhao, XinJie (College of Electronic Information and Optical Engineering, Nankai University)
  • 투고 : 2018.05.03
  • 심사 : 2018.06.25
  • 발행 : 2019.02.12
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초록

This paper presents a tri-wideband bandpass filter (TWB-BPF) with compact size, high band-to-band isolation, and multiple transmission zeros (TZs). The proposed TWB-BPF is based on a multiple-mode resonator (MMR), which is interpreted by the method of the even- and odd-mode analysis technique. The MMR can excite 11 resonant modes, where the first two modes comprise the first passband, the next four modes form the second passband, and the last five modes are used to generate the third passband. In addition, 10 TZs are yielded to obtain high band-to-band isolation and wide stopband suppression characteristics up to $14.95f_{c1}$ ($f_{c1}$ is the center frequency of the first passband). To verify the proposed filter, a TWB-BPF with 3-dB fractional bandwidths (FBWs) of 37.4%, 43.5%, and 40.4% is designed, fabricated, and measured.

키워드

참고문헌

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피인용 문헌

  1. Dual-/tri-band bandpass filters with fully independent and controllable passband based on multipath-embedded resonators vol.12, pp.10, 2019, https://doi.org/10.1017/s175907872000135x