Communications: radio wave antennas – Antennas – With radio cabinet
Patent
1990-12-14
1993-10-19
Wimer, Michael C.
Communications: radio wave antennas
Antennas
With radio cabinet
343906, H01Q 124, H01Q 150
Patent
active
052550010
ABSTRACT:
An antenna for a portable radio apparatus has a first antenna construction connected to the casing of the apparatus and a second antenna construction affixed to a base plate or earth plate which is incorporated in the casing. The first antenna construction has a movable joint which allows the first antenna construction to move between a first position where it is regarded as forming a part of the contour of the casing and a second position where it is protruded from the contour and regarded as being located in free space. The second antenna construction corrects the matching state of the first antenna construction such that adequate antenna radiation characteristics are set up in the first position. Optimal antenna characteristics are, therefore, achievable when the first antenna construction is in any one of the first and second positions.
REFERENCES:
patent: 3946390 (1976-03-01), Alexander et al.
patent: 3969728 (1976-07-01), Hodsdon et al.
patent: 4121218 (1978-10-01), Irwin et al.
patent: 4313119 (1982-01-01), Garay et al.
patent: 4806024 (1989-08-01), Egashira
patent: 4829591 (1989-05-01), Hashimoto et al.
patent: 4868576 (1989-09-01), Johnson, Jr.
patent: 4958382 (1990-09-01), Imanishi
Ono Takao
Tamura Yoshiharu
Le Hoang-anh
NEC Corporation
Wimer Michael C.
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