Generalized dual-plane multicoupled line filters

Author

Yao, Shih-Jih ; Bonetti, René R. ; Williams, Albert E.

Author_Institution

Singapore Technol., Singapore

Volume

41

Issue

12

fYear

1993

fDate

12/1/1993 12:00:00 AM

Firstpage

2182

Lastpage

2189

Abstract

The authors describe the general realization of elliptic function narrow-bandpass filters constructed from two adjacent planes of microstrip quasi-TEM line resonators. This dual-plane configuration allows nonadjacent coupling to be realized through small slots between the planes. Alternate sign coupling is realized by the appropriate positioning of the slot along the resonator length. A model developed from H. Bethe´s small-hole coupling theory (1944) is used to predict these couplings. Adjacent resonator couplings are modeled using a coupled-line analysis modified to characterize the coupling of an inhomogeneous medium. The filter synthesis technique previously developed for waveguide cavity filters can be directly applied in designing a dual-plane filter

Keywords

band-pass filters; microstrip components; microwave filters; resonators; 1.1 GHz; 80 MHz; adjacent resonator couplings; alternate sign coupling; coupled-line analysis; dual-plane configuration; elliptic function narrow-bandpass filters; filter synthesis technique; four-pole elliptic response filter; microstrip quasi-TEM line resonators; multicoupled line microwave filters; slot positioning; small-hole coupling theory; Couplings; Magnetic separation; Microstrip filters; Microstrip resonators; Microwave filters; Resonator filters; Superconducting filters; Superconducting microwave devices; Superconducting thin films; Transfer functions;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.260704

Filename

260704