access icon free Cascaded trisection substrate-integrated waveguide filter with high selectivity

A cascaded trisection substrate-integrated waveguide bandpass filter with better frequency selectivity is presented. The proposed coupling scheme can be divided into two trisection topologies. By changing the signs of coupling coefficients between cascaded resonators, two transmission zeros can be simultaneously placed at the higher or lower stopband, or one can be located below and the other above the passband. A filter sample is designed and fabricated with standard single-layer printed circuit board technology. The measured S-parameters agree well with the simulated counterparts, and good performance of the filter is predicted.

Inspec keywords: band-pass filters; resonator filters; substrate integrated waveguides; S-parameters; waveguide filters; printed circuits

Other keywords: S-parameters; coupling coefficients; cascaded trisection substrate-integrated waveguide filter; frequency selectivity; TZ; standard single-layer printed circuit board technology; SIW bandpass filter; transmission zeros; PCB technology; trisection topologies; cascaded resonators

Subjects: Waveguide and microwave transmission line components; Passive filters and other passive networks; Printed circuits

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http://iet.metastore.ingenta.com/content/journals/10.1049/el.2014.3456
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content/journals/10.1049/el.2014.3456
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