Novel Dual band SIW Filter Using Quad mode Cavity | Zendy

Sambaiah Pelluri | Zendy; Anmol Jain | Zendy; M. V. Kartikeyan | Zendy

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Novel Dual band SIW Filter Using Quad mode Cavity

Author(s) -

Sambaiah Pelluri,

Anmol Jain,

M. V. Kartikeyan

Publication year - 2019

Publication title -

defence science journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.198

H-Index - 32

eISSN - 0976-464X

pISSN - 0011-748X

DOI - 10.14429/dsj.69.14950

Subject(s) - passband , center frequency , band pass filter , multi band device , insertion loss , diagonal , filter (signal processing) , square (algebra) , materials science , physics , optics , acoustics , electronic engineering , engineering , telecommunications , electrical engineering , mathematics , geometry , antenna (radio)

A dual-band bandpass substrate integrated waveguide (SIW) filter is proposed using a quad-mode cavity in this paper. First two degenerative modes (TE102 and TE201) with via perturbation give the first passband. The second passband is realised by using higher modes (side and diagonal modes of TE202) which are obtained by putting square slot at the center of the cavity. The square slot increases the frequency ratio of the center frequencies of first and second passbands. Moreover, orthogonal feed-lines are used in the proposed design to increase transmission zeros (TZs) which helps to improve the selectivity and out-of-band rejection of the filter. Designed and fabricated a dualband filter prototype using a single layer printed circuit board (PCB) technology, size is only 19 mm × 19 mm. The insertion losses are 2.1 dB and 2.4 dB, and fractional bandwidths of 3.40 per cent and 2.00 per cent at 11.00 and 15.58 GHz, respectively. The measurement results show close agreement with the simulation results.

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