High isolation SAW antenna duplexer modules

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

High isolation SAW antenna duplexer modules

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

RIEC - Information Communication Platforms Division

Hitachi, Ltd.

Research output: Contribution to journal › Conference article › peer-review

6 Citations (Scopus)

Abstract

Optimized phase shifter conditions for SAW antenna duplexer modules at not 50 ohm cases have been analytically provided to achieve desired isolation performances. In order to confirm the prediction, obtained optimum condition are applied to two cases. In the EGSM/DCS dual band SAW antenna duplexer modules case, impedances of low noise amplifier connecting the Rx ports are not 50 ohm when the amplifier are off state at transmitter period. We propose a optimized phase shifter circuit for EGSM and DCS Rx output ports using the equation. In Japanese cdmaOne duplexer case, we also propose an optimized phase shifter circuit for the transmitter circuit between Rx band trap and transmitter top filter block. The predictions are verified by the experiments.

Original language	English
Pages (from-to)	309-314
Number of pages	6
Journal	Proceedings - IEEE Ultrasonics Symposium
Volume	1
Publication status	Published - 2001
Event	2001 Ultrasonics Symposium - Atlanta, GA, United States Duration: 2001 Oct 6 → 2001 Oct 10

Cite this

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abstract = "Optimized phase shifter conditions for SAW antenna duplexer modules at not 50 ohm cases have been analytically provided to achieve desired isolation performances. In order to confirm the prediction, obtained optimum condition are applied to two cases. In the EGSM/DCS dual band SAW antenna duplexer modules case, impedances of low noise amplifier connecting the Rx ports are not 50 ohm when the amplifier are off state at transmitter period. We propose a optimized phase shifter circuit for EGSM and DCS Rx output ports using the equation. In Japanese cdmaOne duplexer case, we also propose an optimized phase shifter circuit for the transmitter circuit between Rx band trap and transmitter top filter block. The predictions are verified by the experiments.",

author = "Naoko Kamogawa and Takashi Shiba and Tatsuhiko Ishizaki and Daini Okajima and Norio Hosaka and Minoru Moteki and Seiichi Ogawa and Koji Oda and Mitsutaka Hikita",

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journal = "Proceedings - IEEE Ultrasonics Symposium",

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T1 - High isolation SAW antenna duplexer modules

AU - Kamogawa, Naoko

AU - Shiba, Takashi

AU - Ishizaki, Tatsuhiko

AU - Okajima, Daini

AU - Hosaka, Norio

AU - Moteki, Minoru

AU - Ogawa, Seiichi

AU - Oda, Koji

AU - Hikita, Mitsutaka

PY - 2001

Y1 - 2001

N2 - Optimized phase shifter conditions for SAW antenna duplexer modules at not 50 ohm cases have been analytically provided to achieve desired isolation performances. In order to confirm the prediction, obtained optimum condition are applied to two cases. In the EGSM/DCS dual band SAW antenna duplexer modules case, impedances of low noise amplifier connecting the Rx ports are not 50 ohm when the amplifier are off state at transmitter period. We propose a optimized phase shifter circuit for EGSM and DCS Rx output ports using the equation. In Japanese cdmaOne duplexer case, we also propose an optimized phase shifter circuit for the transmitter circuit between Rx band trap and transmitter top filter block. The predictions are verified by the experiments.

AB - Optimized phase shifter conditions for SAW antenna duplexer modules at not 50 ohm cases have been analytically provided to achieve desired isolation performances. In order to confirm the prediction, obtained optimum condition are applied to two cases. In the EGSM/DCS dual band SAW antenna duplexer modules case, impedances of low noise amplifier connecting the Rx ports are not 50 ohm when the amplifier are off state at transmitter period. We propose a optimized phase shifter circuit for EGSM and DCS Rx output ports using the equation. In Japanese cdmaOne duplexer case, we also propose an optimized phase shifter circuit for the transmitter circuit between Rx band trap and transmitter top filter block. The predictions are verified by the experiments.

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M3 - Conference article

AN - SCOPUS:0035732671

SN - 1051-0117

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JF - Proceedings - IEEE Ultrasonics Symposium

T2 - 2001 Ultrasonics Symposium

Y2 - 6 October 2001 through 10 October 2001

ER -

High isolation SAW antenna duplexer modules

Abstract

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