Morihiko Ikegaya
Hitachi
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Publication
Featured researches published by Morihiko Ikegaya.
ieee antennas and propagation society international symposium | 2004
Keisuke Fukuchi; Tomoyuki Ogawa; Morihiko Ikegaya; H. Tate; K. Takei
The wideband antenna that we developed has a small and thin structure (W 41 /spl times/ H 34 /spl times/ t 0.3 mm); and it is suitable to be installed in small spaces. This antenna has a resonance frequency from 3 GHz to 6 GHz, where VSWR was below 2.0. The radiation pattern is omnidirectional and the average gain curve is almost flat over this frequency range, and the values were around 0 dBi. The group delay is almost flat and its perturbation is within 1 ns over the above frequency range.
2007 2nd International ITG Conference on Antennas | 2007
Ken Takei; Morihiko Ikegaya
We propose a novel antenna design method consisting of the gradient method and method of moment is proposed. An antenna structure is represented by the combination of small segments. By regarding the 0/1 state segment variable as a real parameter, a matrix equation for the gradient method is derived. Fast computation causing of automatic decisions of simultaneous changing segments achieves practical design for various antennas, including large-scale antennas.
Archive | 1997
Kenji Akiba; Morihiko Ikegaya
Archive | 2002
Morihiko Ikegaya; Takahiro Sugiyama; Shinichiro Suzuki; Hisashi Tate
Archive | 2001
Morihiko Ikegaya; Takahiro Sugiyama; Hisashi Tate
Archive | 2004
Ken Takei; Tomoyuki Ogawa; Morihiko Ikegaya; Keisuke Fukuchi
Archive | 2002
Morihiko Ikegaya; Takahiro Sugiyama; Hisashi Tate
Archive | 2002
Morihiko Ikegaya; Takahiro Sugiyama; Hisashi Tate
Archive | 2002
Takahiro Sugiyama; Shinichi Takaba; Morihiko Ikegaya; Shinichiro Suzuki
Archive | 2004
Ken Takei; Tomoyuki Ogawa; Morihiko Ikegaya; Keisuke Fukuchi
