High Q TE01 mode DR cavity filters for wireless base stations

Author

Liang, X.-F. ; Blair, W.D.

Author_Institution

Conductus Inc., Sunnyvale, CA, USA

Volume

2

fYear

1998

fDate

7-12 June 1998

Firstpage

825

Abstract

This paper summarizes the state-of-the-art of high Q TE01 mode DR cavity filters for PCS wireless base station applications. The mode chart and cavity Q are computed for typical commercially-available DR materials. A new approach to suppress the spurious response of the DR cavity filter is proposed and the advantage is analyzed. Experimental 8-pole and 6-pole quasi-elliptic function filters show the typical performances. Special techniques on cross-coupling techniques are used to realize a three-pole elliptic function and a 5-pole canonical asymmetric filter. The 5-pole canonical asymmetric filter, we believe, has never been realized before.

Keywords

UHF filters; dielectric resonators; mobile radio; personal communication networks; resonator filters; waveguide filters; DR cavity filters; PCS wireless base station; TE01 mode; asymmetric filter; canonical asymmetric filter; cavity Q; cross-coupling techniques; high Q filters; mode chart; quasi-elliptic function filters; spurious response; three-pole elliptic function; typical performance; Base stations; Dielectrics; Filtering theory; Frequency measurement; Matched filters; Microwave filters; Personal communication networks; Q measurement; Resonator filters; Volume measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1998 IEEE MTT-S International

Conference_Location

Baltimore, MD, USA

ISSN

0149-645X

Print_ISBN

0-7803-4471-5

Type

conf

DOI

10.1109/MWSYM.1998.705117

Filename

705117