Dual-band coupling and feed structure for microstrip filter design

Author

Lee, Hong-Ming ; Chen, Chung-Rung ; Tsai, Chin-Chuan ; Tsai, Chih-Ming

Author_Institution

Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan

Volume

3

fYear

2004

fDate

6-11 June 2004

Firstpage

1971

Abstract

A new configuration of dual-band filter design is presented in this paper. Stepped-impedance transmission-line sections are used as the tunable dual-band resonators. New coupling structures and matching networks at input and output are also proposed to achieve a dual-band characteristics. Three filters with their second passband at 1.5, 2, and 2.5 times the fundamental frequency are designed as examples, and they are all verified by experimental results.

Keywords

band-pass filters; coupled transmission lines; microstrip filters; microwave circuits; resonator filters; coupled transmission lines; coupling structure; distributed parameter filters; dual-band coupling; dual-band filter design; dual-band resonators; feed structure; filter design configuration; matching networks; microstrip filter design; microwave circuits; passband filters; stepped-impedance transmission-line section; tunable resonators; Band pass filters; Couplings; Dual band; Feeds; Microstrip filters; Microwave filters; Passband; Resonant frequency; Resonator filters; Tunable circuits and devices;

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.2004.1338997

Filename

1338997