A triple-passband filter with doubly coupled hairpin TSIRs

Author

Lihang, Du ; Dexin, Qu ; Gu, Miao

Author_Institution

Inst. of Commun. Eng., PLAUST, Nanjing, China

fYear

2011

fDate

22-25 May 2011

Firstpage

122

Lastpage

125

Abstract

In order to obtain triple-passband filters with much wider fractional bandwidth, a doubly coupled structure with tri-section stepped-impedance resonators(TSIR) in each coupling path is proposed in this paper. This structure has the advantages of a much wider fractional bandwidth in the higher passbands without sacrificing the passband´s insertion losses. To verify the design concept, a 1.0/2.4/3.6GHz triple-passband microstrip filter has been fabricated and measured, It is shown that the measured and simulated performance are in good agreement.

Keywords

band-pass filters; microstrip filters; microwave filters; resonators; coupling path; doubly coupled hairpin TSIR; doubly coupled structure; fractional bandwidth; frequency 1 GHz; frequency 2.4 GHz; frequency 3.6 GHz; insertion losses; tri-section stepped-impedance resonators; triple-passband microstrip filter; Band pass filters; Bandwidth; Couplings; Filtering theory; Microwave filters; Passband; Resonator filters; microstrip filter; parallel doubly coupled structure; tri-section stepped-impedance resonator (TSIR); triple-passband filter;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Technology & Computational Electromagnetics (ICMTCE), 2011 IEEE International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-8556-7

Type

conf

DOI

10.1109/ICMTCE.2011.5915179

Filename

5915179