• Piezoelectrics & Acoustooptics
  • Vol. 42, Issue 6, 743 (2020)
ZHANG Sheng, LIU Shuo, and XIE Zhenjiang
Author Affiliations
  • [in Chinese]
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    DOI: 10.11977/j.issn.1004-2474.2020.06.003 Cite this Article
    ZHANG Sheng, LIU Shuo, XIE Zhenjiang. Design of Triple-band Bandpass Filter Based on Fan-shaped Substrate Integrated Waveguide[J]. Piezoelectrics & Acoustooptics, 2020, 42(6): 743 Copy Citation Text show less

    Abstract

    In this paper, a 60° fan-shaped substrate integrated waveguide resonator is proposed, and then a row of metal vias are loaded into the structure to perturb its TM110, TM210 and TM120 modes. Finally, a compact triple-band bandpass filter based on the 60° fan-shaped substrate integrated waveguide resonator is designed by using the disturbed field mode. The frequency selection characteristic of the filter is improved by introducing a complementary split-ring resonators and source-load coupling structure. The center frequencies of the three passbands are 5.61 GHz, 7.41 GHz, and 8.77 GHz respectively, and the 3 dB bandwidths are 148 MHz, 298 MHz, and 347 MHz respectively. The measured results of the filter are in good agreement with that of the simulation.