Comb-Line Filter with Coupling Capacitor in Ground Plane | Zendy

Toshiaki Kitamura | Zendy

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Comb-Line Filter with Coupling Capacitor in Ground Plane

Author(s) -

Toshiaki Kitamura

Publication year - 2011

Publication title -

active and passive electronic components

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.144

H-Index - 22

eISSN - 1026-7034

pISSN - 0882-7516

DOI - 10.1155/2011/919240

Subject(s) - ground plane , capacitor , passband , resonator , coupling (piping) , filter (signal processing) , microstrip , coupling coefficient of resonators , attenuation , acoustics , line filter , physics , optics , electronic engineering , materials science , band pass filter , engineering , electrical engineering , voltage , antenna (radio) , metallurgy

A comb-line filter with a coupling capacitor in the ground plane is proposed. The filter consists of two quarter-wavelength microstrip resonators. A coupling capacitor is inserted into the ground plane in order to build strong coupling locally along the resonators. The filtering characteristics are investigated through numerical simulations as well as experiments. Filtering characteristics that have attenuation poles at both sides of the passband are obtained. The input susceptances of even and odd modes and coupling coefficients are discussed. The filters using stepped impedance resonators (SIRs) are also discussed, and the effects of the coupling capacitor for an SIR structure are shown

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