Couplings of microstrip square open-loop resonators for cross-coupled planar microwave filters

Author

Hong, Jia-Sheng ; Lancaster, Michael J.

Author_Institution

Sch. of Electron. & Electr. Eng., Birmingham Univ., UK

Volume

44

Issue

11

fYear

1996

fDate

11/1/1996 12:00:00 AM

Firstpage

2099

Lastpage

2109

Abstract

A new type of cross-coupled planar microwave filter using coupled microstrip square open-loop resonators is proposed. A method for the rigorous calculation of the coupling coefficients of three basic coupling structures encountered in this type of filter is developed. Simple empirical models are derived for estimation of the coupling coefficients. Experiments are performed to verify the theory. A four-pole elliptic function filter of this type is designed and fabricated. Both the theoretical and experimental performance is presented

Keywords

band-pass filters; elliptic filters; equivalent circuits; frequency response; microstrip filters; microstrip resonators; microwave filters; passive filters; resonator filters; coupling coefficient; cross-coupled planar filters; empirical models; four-pole elliptic function filter; microstrip resonators; planar microwave filters; square open-loop resonators; Band pass filters; Couplings; Frequency; Magnetic separation; Microstrip filters; Microstrip resonators; Microwave filters; Passband; Resonator filters; Superconducting filters;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.543968

Filename

543968