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access icon free Wide stopband substrate integrated waveguide filter using corner cavities

  • Author(s): F. Zhu 1 ; W. Hong 1 ; J.X. Chen 1 ; K. Wu 2
    • View affiliations
    • Affiliations: 1: State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China;
      2: Poly-Grames Research Center, Department of Electrical Engineering, Ecole Polytechnique de Montreal, Montreal, QC, CanadaH3T 1J4
  • Source: Volume 49, Issue 1, 03 January 2013, p. 50 – 52
    DOI:  10.1049/el.2012.3891 , Print ISSN 0013-5194, Online ISSN 1350-911X
© The Institution of Engineering and Technology
Received 06/11/2012, Published

A type of substrate integrated waveguide (SIW) ‘corner cavity’ is proposed. For each corner cavity, two transmission zeros (TZs) can be introduced and the location of either TZ can easily be controlled by adjusting suitable geometrical parameters. Using the corner cavities, a novel SIW filter with wide stopband characteristic is implemented. The central frequency of the filter is 20 GHz, and the first spurious appears at about 40 GHz, which is two times the central frequency. In addition, the measured stopband attenuation of the filter is better than 50 dB from 21.24 to 37.71 GHz.

Inspec keywords: band-stop filters; microwave filters; poles and zeros; substrate integrated waveguides; waveguide filters

Other keywords: frequency 21.24 GHz to 37.71 GHz; transmission zeros; SIW filter; corner cavities; wide stopband substrate integrated waveguide filter; frequency 20 GHz; stopband attenuation; geometrical parameters; wide stopband characteristic

Subjects: Waveguide and microwave transmission line components; Waveguides and microwave transmission lines; Filters and other networks

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