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

doi:10.1143/jjap.42.3148

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

RIEC - Information Communication Platforms Division

Hitachi, Ltd.

Research output: Contribution to journal › Article › peer-review

5 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 language	English
Pages (from-to)	3148-3151
Number of pages	4
Journal	Japanese Journal of Applied Physics
Volume	42
Issue number	5 B
DOIs	https://doi.org/10.1143/jjap.42.3148
Publication status	Published - 2003 May

Keywords

Antenna duplexer
Isolation
SAW device
SAW filter
SAW module

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10.1143/jjap.42.3148

Cite this

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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.",

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AU - Shiba, Takashi

AU - Ishizaki, Tatsuhiko

AU - Ikeda, Soichiro

AU - Kamogawa, Naoko

AU - Hosaka, Norio

AU - Takagi, Taku

AU - Katagishi, Makoto

AU - Hikita, Mitsutaka

PY - 2003/5

Y1 - 2003/5

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AB - 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.

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KW - Isolation

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KW - SAW filter

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Study of high isolation techniques for surface acoustic wave duplexer modules

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Keywords

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