Communications: radio wave antennas – Antennas – With radio cabinet
Patent
1997-06-16
1999-11-02
Wong, Don
Communications: radio wave antennas
Antennas
With radio cabinet
343722, 343831, H01Q 124
Patent
active
059779179
ABSTRACT:
A portable communication system includes a first metal housing for containing a high frequency circuit unit such as a transmitting circuit and a receiving circuit, a second metal housing for containing a low frequency circuit unit such as a control circuit, and also an antenna mounted on the first metal housing. An antenna apparatus for this portable communication system is arranged by the above-explained antenna, first and second metal housings, and also a control element for controlling distribution of high frequency currents flowing through the first and second metal housings. An antenna radiation pattern of this antenna apparatus can be optimized by controlling an impedance of the control element.
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IEEE Antennas & Propagation Society International Symposium, Jul. 20, 1992, U.S.A., pp. 65-68, XP342313, Sekine et al, "The Radiation Characteristic of a /4 Monopole Antenna, Mounted on a Conducting Body With a Notch".
Proceedings of PIMRC '93, Yokohama, Japan, Sep. 8-11, 1993, pp. 557-561, Gain Enhancement of .lambda./4 Monopole Antenna on a Handset by Passive Loading, presented by Masanobu Hirose, et al.
Proceedings of ICUPC '93, Ottawa, Canada, Oct. 12-15, 1993, pp. 44-48, Pattern Control of a 1/4.lambda. Monopole Antenna on a Handset by Passive Loading, presented by Mananobu Hirose, et al.
IEEE AP-Symposium Digest, Chicago, Ilinois, USA, Jul. 20-24, 1992, pp. 65-68.
Casio Computer Co. Ltd.
Phan Tho
Wong Don
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