Design of compact microstrip diplexer with high selectivity

Author

Velidi, Vamsi Krishna ; Prabhakaran, U. ; Subramanyam, A.V.G. ; Sivareddy, D. ; Srinivasan, V.V.

Author_Institution

Antenna & Passive Syst. Div., ISRO Satellite Centre, Bangalore, India

fYear

2012

fDate

22-25 July 2012

Firstpage

1

Lastpage

4

Abstract

A novel design of compact microstrip diplexer, using coupled dual-mode open-loop resonators, is proposed. The main advantage in using dual-mode open-loop resonators is that a compact narrowband bandpass filter with high selective asymmetrical frequency response is easily realized. This property is explored to design diplexer for a system with two extremely close bands. A prototype diplexer operating in the 2.07/2.3 GHz band, having compact size (44 mm × 11 mm) and high isolation (>;-40 dB), is designed for demonstration.

Keywords

UHF filters; UHF resonators; band-pass filters; microstrip filters; microstrip resonators; multiplexing equipment; asymmetrical frequency response; compact microstrip diplexer; compact narrowband bandpass filter; coupled dual-mode open-loop resonators; frequency 2.07 GHz; frequency 2.3 GHz; Band pass filters; Filtering theory; Microstrip filters; Microstrip resonators; Resonant frequency; Resonator filters; Bandpass filter; diplexer; dualmode; open-loop resonator;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing and Communications (SPCOM), 2012 International Conference on

Conference_Location

Bangalore

Print_ISBN

978-1-4673-2013-9

Type

conf

DOI

10.1109/SPCOM.2012.6290012

Filename

6290012