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Featured researches published by Motoki Ito.


Japanese Journal of Applied Physics | 1995

Design and Evaluation of Li2B4O7 Surface Acoustic Wave Filter

Kazuhiro Otsuka; Masayuki Funami; Motoki Ito; Hirohiko Katsuda; Munecazu Tacano; Masatoshi Adachi; Akira Kawabata

A 250 MHz Li2B4O7 surface acoustic wave (SAW) filter was successfully designed using a newly developed program for double-mode SAW (DMS) filters. The elastic, piezoelectric and dielectric constants of Li2B4O7 grown by the resistance-furnace heating Czochralski method were measured precisely to determine the accurete phase velocity and the electromechanical coupling coefficient of SAW. The mode coupling coefficients were determined as a function of the electrode thickness as well. These coefficients were introduced in the simulation program, and the SAW filter was designed. The DMS filter fabricated in this study had almost the same characteristics as those expected from the design.


Archive | 2004

Surface acoustic wave device and communication apparatus using the same

Kazuhiro Otsuka; Motoki Ito; Kiyohiro Iioka; Tsuyoshi Nakai


Archive | 2004

Surface acoustic wave apparatus and communications device

Motoki Ito; Daisuke Makibuchi; Yoshifumi Yamagata; Kouichi Maruta; Yuuko Yokota


Archive | 2006

Surface acoustic wave device, duplexer, and communications equipment

Motoki Ito


Archive | 2005

Surface acoustic wave device, manufacturing method therefor, and communications equipment

Yuuko Yokota; Masayuki Funami; Takanori Ikuta; Wataru Koga; Yoshifumi Yamagata; Motoki Ito; Kiyohiro Iioka


Archive | 2005

Surface acoustic wave device manufacturing method, surface acoustic wave device, and communications equipment

Yuuko Yokota; Motoki Ito; Kiyohiro Iioka; Wataru Koga; Shigehiko Nagamine


Archive | 2006

Duplexer and communication apparatus using the same

Motoki Ito


Japanese Journal of Applied Physics | 1995

Design and Evaluation of

Kazuhiro Otsuka; Masayuki Funami; Motoki Ito; Hirohiko Katsuda; Munecazu Tacano; Masatoshi Adachi; AkiraKawabata


Archive | 2012

\bf Li_{2}B_{4}O_{7}

Motoki Ito; Naoki Hashimura


Archive | 2009

Surface Acoustic Wave Filter

Yuuko Yokota; Masayuki Funami; Takanori Ikuta; Wataru Koga; Yoshifumi Yamagata; Motoki Ito; Kiyohiro Iioka

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Kazuhiro Otsuka

National Institute for Materials Science

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Masatoshi Adachi

Toyama Prefectural University

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