Receiver control in a communication device by antenna de-tuning

Details Receiver control in a communication device by antenna de-tuning Receiver control in a communication device by antenna de-tuning

1996-10-04

1998-04-28

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455 381, 4552262, 4552501, 4551951, 4551841, 4551861, 34082544, 330298, 343745, 333 171, H04B 118

Patent

active

057458448

ABSTRACT:
A communication device (100) including an antenna (110) for receiving a signal. A receiver circuit (12) is coupled to the antenna (110) and demodulates the signal which is received by the antenna (110). A signal strength measuring circuit (126) is coupled to the antenna (110) and generates a signal strength indicator signal representing a strength of the signal received by the antenna (110). A controller (130) is coupled to the receiver circuit (120) for receiving the signal strength indicator signal and generating a tuning signal in response thereto. An antenna tuning circuit (140) is coupled to the controller (130) and is responsive to the tuning signal for tuning the antenna (110) to a reduced gain level when the strength of the signal received by the antenna (110) is indicative of strong signal conditions.

REFERENCES:
patent: 3571719 (1971-03-01), Beary et al.
patent: 4053838 (1977-10-01), Amaya
patent: 4186351 (1980-01-01), Brefini et al.
patent: 4450588 (1984-05-01), Rohrich et al.
patent: 4630117 (1986-12-01), Parker
patent: 4862516 (1989-08-01), Macnak et al.
patent: 5301358 (1994-04-01), Gaslcill et al.
patent: 5359607 (1994-10-01), Nguyen
patent: 5369792 (1994-11-01), Matsumoto et al.

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