An investigation of performance enhancement for tunable microstrip filter

Author

Ni, Jia ; Tang, Wenxing ; Hao, Zhang-Cheng ; Hong, Jiasheng

Author_Institution

Dept. of Electr., Electron. & Comput. Eng., Heriot-Watt Univ. Riccarton, Edinburgh, UK

fYear

2011

fDate

10-13 Oct. 2011

Firstpage

472

Lastpage

475

Abstract

This paper reports an investigation of performance enhancement for electronically tunable microstrip filter. Based on the effects of lossy components on passband response of a bandpass filter, a new concept to improve the performance (passband flatness and selectivity) is proposed. Unlike other techniques published, this new concept results in nonuniform Q distribution by loading lumped elements to reduce the unloaded Q of the resonator. As examples, fixed and tunable microstrip combline filters with narrow band are simulated and fabricated to validate the proposed concept.

Keywords

band-pass filters; comb filters; microstrip filters; resonator filters; band-passfilter; fixed microstrip combline filters; lumped elements; nonuniform Q distribution; passband response; resonator filter; tunable microstrip combline filters; Band pass filters; Filtering theory; Microstrip filters; Microwave filters; Passband; Resonator filters; Filter predistortion; lossy circuit; nonuniform Q distribution; tunable microstrip filter;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference (EuMC), 2011 41st European

Conference_Location

Manchester

Print_ISBN

978-1-61284-235-6

Type

conf

Filename

6101875