Radiating antenna cable apparatus

Details Radiating antenna cable apparatus Radiating antenna cable apparatus

1991-08-15

1993-02-23

Lee, John D.

Communications: radio wave antennas

Antennas

With terminating resistance at open end

H01Q 1102

Patent

active

051894327

ABSTRACT:
A distributed antenna system for wireless communication inside enclosed areas such as buildings, tunnels, etc., includes an antenna cable and a termination circuit which provides a plurality of termination impedances for the cable, varying as a function of time. The termination circuit may include a diode coupled to the cable at a remote end of the cable and a bias voltage generator coupled to a local end of the cable. Changes in bias voltage alternately forward biases and reverse biases the diode, effectively changing the termination impedance of the antenna cable. As the impedance changes, nodes and regions of high multipath distortion move, so the probability is greatly increased that personnel with remote communication equipment will be able to send and receive good quality signals over the antenna cable at any given location.

REFERENCES:
patent: 2474794 (1949-06-01), Van Beuren
patent: 2966679 (1960-12-01), Harris
patent: 4115780 (1978-09-01), Goodman
patent: 4161736 (1979-07-01), Goodman

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