Small antenna

Details Small antenna Small antenna

1989-03-09

1991-06-11

Wimer, Michael C.

Communications: radio wave antennas

Antennas

With radio cabinet

343741, 343857, 455 89, 455269, H01Q 124

Patent

active

050236210

ABSTRACT:
A small antenna for portable radios and the like in which two planar conductive boards are disposed in parallel relationship at a spaced interval which is small when compared with received radio wavelengths. A dielectric frame is disposed between the two planar conductive boards keeping them at the preselected spaced interval. Arbitrary feeding points are selected along the edges of the two conductive boards and at least one conductor is positioned at an arbitrary selected feeding point to short-circuit the two conductive boards. In some cases a plurality of arbitrary feeding points may be selected along the edges of the two conductive boards and a plurality of conductors positioned at the plurality of arbitary selected feeding points which short-circuits the conductive boards. The positions of the plurality of conductors which short-circuit the conductive boards may be automatically changed at will to provide the most desirable condition responsive to the direction of the radio waves.

REFERENCES:
patent: 3736591 (1973-05-01), Rennels et al.
patent: 4053895 (1977-10-01), Malagisi
patent: 4367474 (1983-01-01), Schaubert et al.
patent: 4379296 (1983-04-01), Farrar et al.
patent: 4538153 (1985-08-01), Taga
patent: 4625212 (1986-11-01), Oda et al.

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