Kenji Hirakawa

发表

1.9 GHz Si Direct Conversion Receiver IC for QPSK Modulation Systems (Special Issue on Microwave Devices for Mobile Communications)

Ryuichi Fujimoto, Tetsuro Itakura, Hiroshi Tanimoto, 1996 .

High Speed Railway Axles

Kenji Hirakawa, 1998 .

Development of a long life 35 Ah capacity VRLA battery for load-leveling applications

Yoshiaki Yamaguchi, Kenji Hirakawa, Yasuhide Nakayama, 2004 .