An integrated SAW antenna duplexer for EGSM/DCS1800/PCS triple-band cellular systems

Author

Shibagaki, Nobuhiko ; MatSuura, Naoki ; Sakiyama, Kazuyuki ; Hikita, Mitsutaka

Author_Institution

Central Res. Lab., Hitachi Ltd., Tokyo, Japan

Volume

1

fYear

2000

fDate

36800

Firstpage

391

Abstract

New surface acoustic wave (SAW) antenna duplexer used in EGSM/DCS1800/PCS triple-band cellular phones has been developed. Unique configurations to achieve miniaturization are demonstrated. Direct-parallel connection between the EGSM receiver SAW filter and the transmitter diode switch, and direct-parallel connection between the DCS and PCS receiver SAW filters make it possible to reduce the number of circuit elements and to achieve a small module size. We also realize balance-mode output capability at receiver port with unbalance-balance transformation circuit on the module. The measurement procedure, balance-mode frequency characteristics for receiver path and unbalance-mode frequency characteristics for transmitter path are also presented

Keywords

cellular radio; digital radio; personal communication networks; surface acoustic wave devices; 1.8 GHz; EGSM/DCS1800/PCS triple-band cellular systems; balance-mode frequency characteristics; balance-mode output capability; circuit elements; direct-parallel connection; integrated SAW antenna duplexer; miniaturization; module size; receiver path; transmitter diode switch; transmitter path; unbalance-balance transformation circuit; Acoustic waves; Cellular phones; Circuits; Diodes; Frequency; Personal communication networks; SAW filters; Surface acoustic waves; Switches; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2000 IEEE

Conference_Location

San Juan

ISSN

1051-0117

Print_ISBN

0-7803-6365-5

Type

conf

DOI

10.1109/ULTSYM.2000.922580

Filename

922580