High isolation techniques for SAW duplexer modules

Takashi Shiba, Naoko Kamogawa, Tatsuhiko Ishizaki, Daini Okajima, Norio Hosaka, Minoru Moteki, Seiichi Ogawa, Ogawa Oda, Mitsutaka Hikita

Research output: Contribution to journalConference articlepeer-review


Isolation characteristics between transmitter and receiver ports for SAW antenna duplexer modules are studied in this paper. Two techniques for high isolation are presented. Optimized phase shifter conditions for SAW antenna duplexer modules at not 50 ohm cases have been analytically provided to achieve desired isolation performances. And switching circuit is proposed for high isolation characteristics. In order to confirm the prediction, obtained optimum phase condition and proposed circuit are applied to EGSM/DCS/PCS triple band SAW antenna duplexer modules.

Original languageEnglish
Pages (from-to)105-108
Number of pages4
JournalProceedings of the IEEE Ultrasonics Symposium
Publication statusPublished - 2002 Dec 1
Externally publishedYes
Event2002 IEEE Ultrasonics Symposium - Munich, Germany
Duration: 2002 Oct 82002 Oct 11

ASJC Scopus subject areas

  • Acoustics and Ultrasonics


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