A new balanced-unbalanced type RF-band SAW filter

Author

Taguchi, Y. ; Seki, S.-I. ; Onishi, K. ; Eda, K.

Author_Institution

Device Eng. Dev. Center, Matsushita Electr. Ind. Co. Ltd., Osaka, Japan

Volume

2

fYear

1996

fDate

17-21 June 1996

Firstpage

417

Abstract

A new balanced-unbalanced type RF-band (950 MHz) surface acoustic wave (SAW) filter for use in portable telephones is presented. This SAW filter has unbalanced input and balanced output terminals. Balanced-unbalanced type SAW filters having a pass-band at 950 MHz were fabricated. The obtained results showed excellent characteristics such as low insertion loss, wide bandwidth, and small VSWR. Using the SAW filter, one can realize balanced-type RF circuits in portable telephones.

Keywords

UHF filters; acoustic microwave devices; baluns; band-pass filters; land mobile radio; surface acoustic wave resonator filters; 3 dB; 30 MHz; 950 MHz; LiNbO/sub 3/; VSWR; Y-cut X-propagation LiNbO/sub 3/ substrate; balanced output terminals; balanced-type RF circuits; balanced-unbalanced type RF-band SAW filter; inline coupled resonator filters; low insertion loss; pass-band; portable telephones; unbalanced input terminals; wide bandwidth; Circuits; Frequency measurement; Impedance matching; Insertion loss; Radio frequency; Resonator filters; SAW filters; Surface acoustic wave devices; Surface acoustic waves; Telephony;

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.1996.508757

Filename

508757