Quasi-lumped suspended stripline filters with adjustable transmission zeroes

Author

Menzel, Wolfgang ; Berry, Mohit

Author_Institution

Microwave Techniques, Ulm Univ., Germany

Volume

3

fYear

2004

fDate

6-11 June 2004

Firstpage

1601

Abstract

Based on quasi-lumped resonators in suspended stripline technique, very compact filters are realized. The resonators consist of patch-like capacitive elements and thin inductive strips, coupled electromagnetically to the input lines and adjacent resonators. By properly arranging these resonators, transmission zeroes can be produced and shifted easily to frequencies either below or above the passband. A detailed discussion of this effect is given, and three sample filters are presented. At 8.5 GHz, a four resonator filter has a length of 12 mm only. With a bandwidth of 1.3 GHz, minimum insertion loss is 0.7 dB including connecting lines and transitions to the coaxial test system.

Keywords

band-pass filters; elliptic filters; resonator filters; strip line filters; zero assignment; 0.7 dB; 1.3 GHz; 12 mm; 8.5 GHz; adjustable transmission zeroes; bandpass filters; coaxial test system; compact filters; elliptic filters; patch-like capacitive elements; quasilumped resonators; quasilumped stripline filter; resonator filter; suspended stripline filters; thin inductive strips; Band pass filters; Bandwidth; Electromagnetic coupling; Frequency; Insertion loss; Joining processes; Passband; Resonator filters; Stripline; Strips;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2004 IEEE MTT-S International

ISSN

0149-645X

Print_ISBN

0-7803-8331-1

Type

conf

DOI

10.1109/MWSYM.2004.1338888

Filename

1338888