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Dive into the research topics where Hiroshi Haruki is active.

Publication


Featured researches published by Hiroshi Haruki.


personal, indoor and mobile radio communications | 2003

A planar sector antenna suitable for small WLAN card terminal

Hiroyuki Uno; Yutaka Saito; Genichiro Ohta; Hiroshi Haruki; Yoshio Koyanagi; Kiyoshi Egawa

In this paper, a planar antenna and the 6-sector arrangement for a small card type mobile terminal used in the wireless local area network (WLAN) system are proposed. The radiation characteristics, particularly the tilted main beam in vertical plane and current distribution are calculated and discussed. We show that the 6-sector beams of half power width of 60 degrees are obtained by the proposed arrangement that is in a rectangular configuration of 10.6 mm /spl times/ 44 mm at 25 GHz band, and this is suited to a built-in antenna mounted on the edge of the card type mobile terminal like a PCMCIA card.


Archive | 2001

Antenna apparatus and a portable wireless communication apparatus

Yutaka Saitou; Tomoaki Nishikido; Hiroshi Haruki


Archive | 1996

Transmitter of wireless system and high frequency power amplifier used therein

Hikaru Ikeda; Hiroaki Kosugi; Kaoru Ishida; Nobuo Fuse; Hideki Yagita; Hiroshi Haruki


Archive | 2005

POLARIZATION SWITCHING ANTENNA DEVICE

Kazuya Tani; Yoshio Koyanagi; Hiroshi Haruki


Archive | 2001

Antenna apparatus and wristwatch radio communication device using same

Yutaka Saitou; Isamu Nagano; Hiroshi Haruki


Archive | 1979

Frequency synthesizing system for AM·SSB transceiver

Hiroshi Haruki; Masahiro Watanabe


Archive | 2002

Built-in anenna of portable radio apparatus

Tomoaki Nishikido; Yutaka Saito; Hiroshi Haruki; Kouta Aoki


Archive | 1999

Antenna and radio device

Yutaka Saito; Hiroshi Haruki


Archive | 1997

Radio circuit having a local oscillator frequency which differs from the transmit frequency or the receive frequency and mobile radio apparatus

Hisashi Adachi; Hiroaki Kosugi; Kaoru Ishida; Hiroshi Haruki; Junichi Yasuno; Kazuhiko Ikeda


Archive | 2004

Polarization switching antenna equipment

Hiroshi Haruki; Yoshio Koyanagi; Kazuya Tani; 芳雄 小柳; 宏志 春木; 和也 谷

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