Miniature antenna

Details Miniature antenna Miniature antenna

1989-10-27

1991-05-21

Hille, Rolf

Communications: radio wave antennas

Antennas

With radio cabinet

343866, 343855, H01Q 124

Patent

active

050179322

ABSTRACT:
A miniature antenna, in which a pair of square conductor plates disposed in parallel with a spacing sufficiently smaller than the wavelength used are fixed to each other to an insulating frame to form an antenna structure which is used also as a case. Feeding terminals are provided at a desired position on one side of each of the conductor plates. High-frequency-wise short-circuit elements are provided at a plurality of positions on other sides of the conductor plates. A gravity-direction sensor, which produces an output in accordance with the direction of gravity, is provided in the case. The plurality of short-circuit elements are selectively short-circuited by the output of the gravity-direction sensor so that the plane of polarization of the antenna is brought into agreement with the direction of gravity.

REFERENCES:
patent: 4004228 (1977-01-01), Mullett
patent: 4123756 (1978-10-01), Nagata et al.
patent: 4625212 (1986-11-01), Oda et al.
patent: 4862181 (1989-08-01), Ponce De Leon et al.

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