A 900 MHz ladder-type SAW filter duplexer

Author

Weigel, R. ; Weigenthaler, K. ; Dill, R. ; Schropp, I.

Author_Institution

Inst. fur Hochfrequenztech., Tech. Univ. Munchen, Germany

Volume

2

fYear

1996

fDate

17-21 June 1996

Firstpage

413

Abstract

A low-cost hybrid-integrated SAW filter duplexer consisting of receiver top filter, transmitter final-stage filter and antenna terminal has been developed. The prototype design was oriented at the GSM system specifications in the 900 MHz-band. Three-stage ladder-type SAW filters have been designed to perform the duplexing function by the use of only one transmission line. The complete duplexer has an insertion loss of 1.2 dB in the Tx path (Tx) and 2.1 dB in the Rx path (Rx). The 3 dB-bandwidth is 40.1 MHz (Tx) and 47.4 MHz (Rx), respectively.

Keywords

UHF filters; frequency division multiplexing; hybrid integrated circuits; ladder filters; land mobile radio; multiplexing equipment; surface acoustic wave filters; transceivers; 1.2 dB; 2.1 dB; 3 dB-bandwidth; 40.1 MHz; 47.4 MHz; 900 MHz; 900 MHz-band; FDD mobile radio transceivers; GSM system specifications; LiTaO/sub 3/; LiTaO/sub 3/ substrate; antenna terminal; frequency division duplexing; hybrid-integrated SAW filter duplexer; insertion loss; ladder-type SAW filter duplexer; receiver top filter; three-stage ladder-type SAW filters; transmission line; transmitter final-stage filter; Digital filters; Europe; Frequency; GSM; Insertion loss; Personal communication networks; Receiving antennas; SAW filters; Surface acoustic waves; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1996., IEEE MTT-S International

Conference_Location

San Francisco, CA, USA

ISSN

0149-645X

Print_ISBN

0-7803-3246-6

Type

conf

DOI

10.1109/MWSYM.1996.508756

Filename

508756