Study of high isolation and miniature saw duplexer

Takashi Shiba; Masashi Ooki; Junichi Hamasaki; Osamu Hikino; Yuji Fujita

doi:10.1109/ULTSYM.2006.206

Study of high isolation and miniature saw duplexer

Takashi Shiba, Masashi Ooki, Junichi Hamasaki, Osamu Hikino, Yuji Fujita

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Citations (Scopus)

Abstract

Finite element methods for integrated circuits of LTCC and equivalent circuit models for SAW chips are applied to SAW duplexer analysis. We improve this composite method with considering feed through. A good agreement with this improved composite simulation and experiment is obtained. We have found that magnetic interaction between a phase-shifter and a matching element for Tx circuit becomes a worse of Tx-Rx isolation. We have also found an improved shape of element to suppress the magnetic interaction between these circuits by try and error method. An isolation value of 48 dB in Rx band is observed at an improved duplexer. Consequently it is verified that a improved composite model is effective for analyzing Tx-Rx isolation of a miniature SAW duplexer. And high isolation characteristic for SAW duplexer is also obtained by using improved structure.

Original language	English
Title of host publication	2006 IEEE International Ultrasonics Symposium, IUS
Pages	1060-1064
Number of pages	5
DOIs	https://doi.org/10.1109/ULTSYM.2006.206
Publication status	Published - 2006 Dec 1
Externally published	Yes

Publication series

Name	Proceedings - IEEE Ultrasonics Symposium
Volume	1
ISSN (Print)	1051-0117

ASJC Scopus subject areas

Acoustics and Ultrasonics

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10.1109/ULTSYM.2006.206

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title = "Study of high isolation and miniature saw duplexer",

abstract = "Finite element methods for integrated circuits of LTCC and equivalent circuit models for SAW chips are applied to SAW duplexer analysis. We improve this composite method with considering feed through. A good agreement with this improved composite simulation and experiment is obtained. We have found that magnetic interaction between a phase-shifter and a matching element for Tx circuit becomes a worse of Tx-Rx isolation. We have also found an improved shape of element to suppress the magnetic interaction between these circuits by try and error method. An isolation value of 48 dB in Rx band is observed at an improved duplexer. Consequently it is verified that a improved composite model is effective for analyzing Tx-Rx isolation of a miniature SAW duplexer. And high isolation characteristic for SAW duplexer is also obtained by using improved structure.",

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AU - Shiba, Takashi

AU - Ooki, Masashi

AU - Hamasaki, Junichi

AU - Hikino, Osamu

AU - Fujita, Yuji

PY - 2006/12/1

Y1 - 2006/12/1

N2 - Finite element methods for integrated circuits of LTCC and equivalent circuit models for SAW chips are applied to SAW duplexer analysis. We improve this composite method with considering feed through. A good agreement with this improved composite simulation and experiment is obtained. We have found that magnetic interaction between a phase-shifter and a matching element for Tx circuit becomes a worse of Tx-Rx isolation. We have also found an improved shape of element to suppress the magnetic interaction between these circuits by try and error method. An isolation value of 48 dB in Rx band is observed at an improved duplexer. Consequently it is verified that a improved composite model is effective for analyzing Tx-Rx isolation of a miniature SAW duplexer. And high isolation characteristic for SAW duplexer is also obtained by using improved structure.

AB - Finite element methods for integrated circuits of LTCC and equivalent circuit models for SAW chips are applied to SAW duplexer analysis. We improve this composite method with considering feed through. A good agreement with this improved composite simulation and experiment is obtained. We have found that magnetic interaction between a phase-shifter and a matching element for Tx circuit becomes a worse of Tx-Rx isolation. We have also found an improved shape of element to suppress the magnetic interaction between these circuits by try and error method. An isolation value of 48 dB in Rx band is observed at an improved duplexer. Consequently it is verified that a improved composite model is effective for analyzing Tx-Rx isolation of a miniature SAW duplexer. And high isolation characteristic for SAW duplexer is also obtained by using improved structure.

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M3 - Conference contribution

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Study of high isolation and miniature saw duplexer

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