Compact and high isolation microstrip diplexer for GPS and UWB application

Author

Deng, H.W. ; Zhao, Y.J. ; Fu, Fred ; Zhou, X.J. ; Liu, Y.Y.

Author_Institution

Coll. of Electron. & Inf. Eng., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China

Volume

49

Issue

10

fYear

2013

fDate

May 9 2013

Firstpage

659

Lastpage

661

Abstract

A novel microstrip diplexer with low insertion loss, high selectivity and isolation performance is proposed through the combination of two compact filters composed of short-circuit centred stepped impedance resonators and, a side-coupled shorted microstrip line, which are designed for GPS and UWB application, respectively. Due to the intrinsic characteristics and mutual loading effect of the two filters, multiple transmission zeros can be created to improve the out-of-band rejection and isolation of the diplexer. More compact size is obtained without an extra junction matching networks. Simulated results of the fabricated diplexer agree well with measured ones.

Keywords

Global Positioning System; microstrip lines; multiplexing equipment; resonators; ultra wideband communication; GPS; UWB application; compact filters; compact microstrip diplexer; extra junction matching network; fabricated diplexer; high isolation microstrip diplexer; high selectivity; isolation performance; low insertion loss; multiple transmission zeros; mutual loading effect; out-of-band rejection; short-circuit centred stepped impedance resonators; side-coupled shorted microstrip line;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2012.3247

Filename

6528810