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Featured researches published by Toshikazu Imaoka.


electronic components and technology conference | 2006

Integrated passive design library for multilayer PCB

Geert Carchon; K. Vaesen; Xiao Sun; Steven Brebels; Toshikazu Imaoka; Tetsuro Sawai; Yasunori Inoue

An integrated passives library for a 4-metal layer microstrip PCB-technology has been developed featuring scaleable models for microstrip transmission lines, striplines, discontinuities, integrated single and multi-layer inductors and integrated capacitors. Capacitor Q-factors around 50 are obtained with Q-factors being primarily dominated by the dielectrics loss tangent. Inductor Q-factors around 40 are obtained for single and multi-layer integrated inductors. Bandpass filters, lowpass filters, quadrature couplers and baluns have been designed for the 2.4GHz and 5.2GHz band with good performance. The influence of temperature on the RF performance of integrated inductors, capacitors and an integrated bandpass filter has been evaluated over the 5degC-115degC temperature range


Archive | 1994

Communication apparatus using common amplifier for transmission and reception

Tetsuro Sawai; Hisanori Uda; Toshikazu Hirai; Toshikazu Imaoka; Yasoo Harada; Keiichi Honda; Masao Nishida


Archive | 1994

IC chip for different type IC packages

Hisanori Uda; Tetsuro Sawai; Toshikazu Imaoka; Toshikazu Hirai; Yasoo Harada


Archive | 2010

Circuit substrate structure and circuit apparatus

Toshikazu Imaoka; Tetsuro Sawai; Atsushi Saita; Takeshi Yamaguchi


Archive | 1994

Double-balanced mixer circuit

Hisanori Uda; Tetsuro Sawai; Toshikazu Imaoka; Toshikazu Hirai; Yasoo Harada


Archive | 2005

Signal line circuit device

Takeshi Yamaguchi; Toshikazu Imaoka


Archive | 2007

Semiconductor Module And Mobile Apparatus

Toshikazu Imaoka; Takeshi Otsuka; Tetsuro Sawai


Archive | 2005

Semiconductor device having laminated structure

Toshikazu Imaoka; Ryosuke Usui


Archive | 2005

Semiconductor device with a substrate having a spiral shaped coil

Akihiro Sato; Satoru Sekiguchi; Kiyokazu Kamado; Kazunari Kurokawa; Makoto Tsubonoya; Kiyoshi Mita; Yoichi Nabeta; Tetsuro Sawai; Toshikazu Imaoka


Archive | 2005

Semiconductor apparatus and circuit apparatus

Akihiro Sato; Satoru Sekiguchi; Kiyokazu Kamado; Kazunari Kurokawa; Makoto Tsubonoya; Kiyoshi Mita; Yoichi Nabeta; Tetsuro Sawai; Toshikazu Imaoka

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