Title :
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
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;
Conference_Titel :
Microwave Symposium Digest, 2001 IEEE MTT-S International
Conference_Location :
Phoenix, AZ, USA
Print_ISBN :
0-7803-6538-0
DOI :
10.1109/MWSYM.2001.967207
