EXTENDED DOUBLET BANDPASS FILTERS IMPLEMENTED WITH MICROSTRIP RESONATOR AND FULL-/HALF-MODE SUBSTRATE INTEGRATED CAVITIES | Zendy

LinSheng Wu | Zendy; Junfa Mao | Zendy; Wei Shen | Zendy; WenYan Yin | Zendy

Open Access

EXTENDED DOUBLET BANDPASS FILTERS IMPLEMENTED WITH MICROSTRIP RESONATOR AND FULL-/HALF-MODE SUBSTRATE INTEGRATED CAVITIES

Author(s) -

LinSheng Wu,

Junfa Mao,

Wei Shen,

WenYan Yin

Publication year - 2010

Publication title -

electromagnetic waves

Language(s) - English

Resource type - Journals

eISSN - 1559-8985

pISSN - 1070-4698

DOI - 10.2528/pier10081206

Subject(s) - band pass filter , resonator , microstrip , substrate (aquarium) , materials science , optoelectronics , insertion loss , electronic engineering , acoustics , physics , engineering , oceanography , geology

Two extended doublet bandpass fllters with compact size and good spurious suppression characteristic are proposed. One is built up by a dual-mode microstrip resonator with a full-mode substrate integrated cavity, while the other is composed of a microstrip resonator and a half-mode cavity. The relationship between the location of their transmission zeros and the impedance ratio of the microstrip resonator is analyzed theoretically. Our proposed fllters only occupy the areas of 0:69‚ 2 ="r and 0:51‚ 2 ="r, and they also have wide upper stopband. The predicted performances are demonstrated by the reasonable agreement obtained between their simulated and measured S-parameters.

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