Study of high isolation techniques for surface acoustic wave duplexer modules

Takashi Shiba, Tatsuhiko Ishizaki, Soichiro Ikeda, Naoko Kamogawa, Norio Hosaka, Taku Takagi, Makoto Katagishi, Mitsutaka Hikita

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The isolation characteristics between transmitter and receiver ports for surface acoustic wave (SAW) antenna duplexer modules are studied. Three new techniques are developed to achieve the desired isolation performances in this study. Optimized phase shifter conditions are solved analytically. An improved switching circuit is proposed for cancellation of the inductive element of a pin-diode. A design rule of distance between two lines for SAW antenna duplexer modules is also proposed. The obtained condition and circuit are applied to an extended global system for mobile communication/digital cellular system (EGSM/DCS) dual-band and an extended global system for mobile communication/digital cellular system/personal communication system (EGSM/DCS/PCS) triple-band SAW antenna duplexer modules. Sufficiently high isolation characteristics are obtained.

Original languageEnglish
Pages (from-to)3148-3151
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume42
Issue number5 B
DOIs
Publication statusPublished - 2003 May
Externally publishedYes

Keywords

  • Antenna duplexer
  • Isolation
  • SAW device
  • SAW filter
  • SAW module

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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