Hybrid resonator microstrip line electrically tunable filter

Author

Xiao-Peng Liang ; Yongfei Zhu

Author_Institution

Paratek Microwave Inc., Columbia, MD, USA

Volume

3

fYear

2001

fDate

20-24 May 2001

Firstpage

1457

Abstract

A novel hybrid resonator microstrip line electrically tunable filter is presented in this paper. The tunable filter has mixed combline resonators and a hairpin like resonator. With this mixed resonator filter, transmission zeros can be obtained on each side of the passband. This elliptic function filter response is achieved without any nonadjacent coupling. Parascan/sup TM/ dielectric material varactors are then used at the end of each resonator, so that the filter passband is electrically tunable. A 4-pole design example is provided. The transmission zeros are clearly shown in both simulation and measurement.

Keywords

comb filters; elliptic filters; microstrip filters; resonator filters; tuning; varactors; Parascan; combline resonators; electrically tunable filter; elliptic function filter response; hairpin like resonator; hybrid resonator microstrip line filters; transmission zeros; varactors; Band pass filters; Couplings; Degradation; Filtering theory; Frequency; Microstrip filters; Microstrip resonators; Passband; Resonator filters; Varactors;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2001 IEEE MTT-S International

Conference_Location

Phoenix, AZ, USA

ISSN

0149-645X

Print_ISBN

0-7803-6538-0

Type

conf

DOI

10.1109/MWSYM.2001.967177

Filename

967177