Optimally grounded small loop antenna

Details Optimally grounded small loop antenna Optimally grounded small loop antenna

1987-09-10

1989-03-21

Sikes, William L.

Communications: radio wave antennas

Antennas

With radio cabinet

343748, H01Q 124

Patent

active

048147761

ABSTRACT:
A small closed loop antenna is formed by a flat metal member formed into a U-shape which also serves as the front, back and top surfaces, or parts thereof, of the housing for a portable communications receiver. Connected to the open (bottom) end of the arms is an isolation network providing an optimum antenna ground and a reactance network which applies a capacitive reactance across the antenna and isolation network so that the conductive member forms an antenna that detects the H-field of the electromagnetic wave to be received. The reactance network is tunable to adjust the antenna for reception at particular frequencies.

REFERENCES:
patent: 3736591 (1973-05-01), Rennels et al.
patent: 4123756 (1978-10-01), Nagata et al.
patent: 4491978 (1985-01-01), Nagata et al.
Motorola Publication No. 68P1005C65, Issue A, published 8/27/76, entitled "Pageboy II FM Radio Pager, A04FNC Series", copyright 1974 to Motorola, Inc.

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