Taku Takagi
Hitachi
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Publication
Featured researches published by Taku Takagi.
Japanese Journal of Applied Physics | 2003
Takashi Shiba; Tatsuhiko Ishizaki; Soichiro Ikeda; Naoko Kamogawa; Norio Hosaka; Taku Takagi; Makoto Katagishi; Mitsutaka Hikita
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.
Archive | 2008
Katsuhide Ichikawa; Ryo Kadoi; Taku Takagi; 勝英 市川; 涼 門井; 高木 卓
Archive | 2008
Katsuhide Ichikawa; Taku Takagi; 勝英 市川; 高木 卓
Archive | 2002
Osamu Hasegawa; Makoto Katagishi; Taku Takagi; 片岸 誠; 長谷川 修; 高木 卓
Archive | 2001
Osamu Hasegawa; Makoto Katagishi; Yoshiichi Sugiyama; Taku Takagi; 由一 杉山; 片岸 誠; 修 長谷川; 高木 卓
Archive | 2001
Satoshi Iimuro; Makoto Katagishi; Takumi Okamura; Yoshiichi Sugiyama; Taku Takagi; 巧 岡村; 由一 杉山; 片岸 誠; 聡 飯室; 高木 卓
Archive | 2008
Yuhei Niwa; Taku Takagi; Masaaki Yamada; 雄平 丹羽; 山田 正明; 高木 卓
Archive | 2002
Osamu Hasegawa; Makoto Katagishi; Kenji Sano; Taku Takagi; 賢治 佐野; 片岸 誠; 修 長谷川; 高木 卓
Archive | 2007
Makoto Katagishi; Taku Takagi; 片岸 誠; 高木 卓
Archive | 2006
Satoshi Adachi; Yusaku Katsube; Yoshiichi Sugiyama; Taku Takagi; Masazumi Tone; 正純 利根; 勇作 勝部; 聡 安達; 由一 杉山; 高木 卓
