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Presents a study on the modeling of conductor-loaded resonators and filters in rectangular enclosures and the associated coupling structures. Examination of the generalized scattering matrices yielded by modeling; Discussion on the short and open conditions and cascading procedures applied between coupling coefficients; Details on the measured frequency response of the filters.

Presents a study which confirmed the observed bandwidth expansion factor of combline filters having ground-plane spacings equal to a significant fraction of a wavelength in the range 0.08-0.35. Type of program used to make the confirmation; What the bandwith expansion factor is accompanied by; Effects demonstrated by interdigital filters.

Presents a rigorous method for analysis of coupled dielectric quarter wavelength combline resonators. Investigation of the resonant frequencies and coupling coefficients of the resonators coupled by different coupling structures; Description of a filter design technique based on the result of numerical analysis.