A Novel Dual-Band Controllable Bandpass Filter Based on Fan-Shaped Substrate Integrated Waveguide

Sheng Zhang, Jia-Yu Rao, Jia-Sheng Hong, Fa-Lin Liu

Research output: Contribution to journalArticle

15 Citations (Scopus)
44 Downloads (Pure)

Abstract

A compact dual-band bandpass filter with controllable center frequencies based on the 90° fan-shaped substrate integrated waveguide resonator (FSSIWR) is first proposed in this letter. Dual-band response is achieved by the fundamental mode (TM₁₀₁ mode) and high mode (TM₂₀₁ mode) of the FSSIWR, respectively. In this design, two pairs of the posts are loaded at the 45° direction of FSSIWRs, which produce perturbation to adjust the center frequency of the first passband. In order to control the second-passband center frequency, the complementary split-ring resonators (CSRRs) are etched on the surface of the resonator. The etched CSRRs can not only adjust the second-passband center frequency by changing the locations of the CSSRs but also produce a transmission zero (TZ) in the upper stopband of the second-passband. In addition, other five TZs are obtained by introducing source-load coupling, which highly improve the frequency selectivity. Finally, the proposed filter is fabricated and measured. The measured results agree well with the simulated ones.
Original languageEnglish
Pages (from-to)308-310
JournalIEEE Microwave and Wireless Components Letters
Volume28
Issue number4
Early online date1 Mar 2018
DOIs
Publication statusPublished - Apr 2018

Keywords

  • Band-pass filters
  • Couplings
  • Dual band
  • Dual-band bandpass filter (BPF)
  • fan-shaped substrate integrated waveguide resonator (FSSIWR)
  • frequency controllable.
  • Passband
  • Resonant frequency
  • Resonators
  • Substrates

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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