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Sectored antenna receiving system

  • US 4,101,836 A
  • Filed: 05/02/1977
  • Issued: 07/18/1978
  • Est. Priority Date: 05/02/1977
  • Status: Expired due to Term
First Claim
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1. A radio frequency communication system comprising:

  • a sectored antenna means having a plurality of sectors, each sector predeterminedly oriented with respect to the remaining sectors;

    an antenna switch means having a plurality of input terminals, a control terminal, and an output terminal and further including means responsive to control signals at the control terminal to couple a selected input terminal to the output terminal;

    antenna coupling means for coupling each antenna sector to a predetermined input terminal of the antenna switch means;

    receiver means adapted for receiving radio frequency signals;

    signal strength detector means, coupled to the receiver means, for producing a signal representative of the strength of the radio frequency signal being received;

    receiver coupling means for coupling the antenna switch means output terminal to the receiver means; and

    scan control logic means, having an input coupled to the signal strength detector and an output coupled to the antenna switch means control terminal, and operable in a first mode for producing control signals at its output causing sequential coupling of the sectors to the receiver means for effecting the scanning thereof, the scan control logic means including comparator means for monitoring the signal strength detector produced signal and activating the scan control logic to a second mode in response to said signal being of predetermined magnitude, the scan control logic means operable in its second mode to continue sector scanning for a predetermined interval after which scanning is inhibited and the receiver is coupled to that sector which produces the greatest detected signal strength.

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