Radio frequency surface acoustic wave filter having narrow bandwidth and excellent temperature characteristic

Takaki Murata; Michio Kadota; Takeshi Nakao; Kenji Matsuda

doi:10.1143/JJAP.47.4101

Radio frequency surface acoustic wave filter having narrow bandwidth and excellent temperature characteristic

Takaki Murata, Michio Kadota, Takeshi Nakao, Kenji Matsuda

ENG - Robotics

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

9 Citations (Scopus)

Abstract

An RF filter in the high-frequency range such as that used in MediaFLO™ and time division synchronous code division multiple access in a Chinese handy phone system requires a narrow bandwidth and also a very excellent temperature coefficient of frequency (TCF). A flat SiO₂ /high-density metal electrode/36-48° YX-LiTaO₃ structure has been applied to this system by adjusting the optimum thickness of SiO₂ and the metal electrode to realize a very excellent TCF. As a result, the RF filter with a very excellent TCF of - 1.01 ppm/°C, a good insertion loss, and a large outband rejection has been realized.

Original language	English
Pages (from-to)	4101-4103
Number of pages	3
Journal	Japanese journal of applied physics
Volume	47
Issue number	5 PART 2
DOIs	https://doi.org/10.1143/JJAP.47.4101
Publication status	Published - 2008 May 23

Keywords

Excellent TCF
High-density metal
Narrow band
RF filter
SAW

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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10.1143/JJAP.47.4101

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title = "Radio frequency surface acoustic wave filter having narrow bandwidth and excellent temperature characteristic",

abstract = "An RF filter in the high-frequency range such as that used in MediaFLO{\texttrademark} and time division synchronous code division multiple access in a Chinese handy phone system requires a narrow bandwidth and also a very excellent temperature coefficient of frequency (TCF). A flat SiO2 /high-density metal electrode/36-48° YX-LiTaO3 structure has been applied to this system by adjusting the optimum thickness of SiO2 and the metal electrode to realize a very excellent TCF. As a result, the RF filter with a very excellent TCF of - 1.01 ppm/°C, a good insertion loss, and a large outband rejection has been realized.",

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author = "Takaki Murata and Michio Kadota and Takeshi Nakao and Kenji Matsuda",

year = "2008",

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doi = "10.1143/JJAP.47.4101",

language = "English",

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T1 - Radio frequency surface acoustic wave filter having narrow bandwidth and excellent temperature characteristic

AU - Murata, Takaki

AU - Kadota, Michio

AU - Nakao, Takeshi

AU - Matsuda, Kenji

PY - 2008/5/23

Y1 - 2008/5/23

N2 - An RF filter in the high-frequency range such as that used in MediaFLO™ and time division synchronous code division multiple access in a Chinese handy phone system requires a narrow bandwidth and also a very excellent temperature coefficient of frequency (TCF). A flat SiO2 /high-density metal electrode/36-48° YX-LiTaO3 structure has been applied to this system by adjusting the optimum thickness of SiO2 and the metal electrode to realize a very excellent TCF. As a result, the RF filter with a very excellent TCF of - 1.01 ppm/°C, a good insertion loss, and a large outband rejection has been realized.

AB - An RF filter in the high-frequency range such as that used in MediaFLO™ and time division synchronous code division multiple access in a Chinese handy phone system requires a narrow bandwidth and also a very excellent temperature coefficient of frequency (TCF). A flat SiO2 /high-density metal electrode/36-48° YX-LiTaO3 structure has been applied to this system by adjusting the optimum thickness of SiO2 and the metal electrode to realize a very excellent TCF. As a result, the RF filter with a very excellent TCF of - 1.01 ppm/°C, a good insertion loss, and a large outband rejection has been realized.

KW - Excellent TCF

KW - High-density metal

KW - Narrow band

KW - RF filter

KW - SAW

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