Microstrip miniaturized loop-filters with high out-of-band rejection for future 3G mobile terminals

Author

Toutain, Y. ; Coupez, J.-P. ; Person, C.

Author_Institution

LEST, ENST de Bretagne, Brest, France

Volume

3

fYear

2001

fDate

20-24 May 2001

Firstpage

1589

Abstract

This paper deals about the implementation of miniaturized microstrip band-pass filters operating on a very narrow bandwidth. We propose an original synthesis for achieving high out-of-band rejection by means of a 2/sup nd/ order resonant structure, for which transmission zeros are introduced through mutual coupling effects. Quite good performances are obtained regarding losses, size and spurious resonances for the proposed topology, which can be considered as a good solution for future mobile on-board equipments.

Keywords

band-pass filters; microstrip filters; microstrip resonators; mobile radio; poles and zeros; resonator filters; telecommunication terminals; 3G mobile terminal; band pass filter; microstrip resonator loop filter; miniaturization; mutual coupling; on-board equipment; out-of-band rejection; transmission zero; Band pass filters; Bandwidth; Ceramics; Filtering theory; Microstrip filters; Mutual coupling; Propagation losses; Resonance; Resonant frequency; Resonator filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2001 IEEE MTT-S International

Conference_Location

Phoenix, AZ, USA

ISSN

0149-645X

Print_ISBN

0-7803-6538-0

Type

conf

DOI

10.1109/MWSYM.2001.967207

Filename

967207