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Calibration method for satellite communications payloads using hybrid matrices

  • US 5,784,030 A
  • Filed: 06/06/1996
  • Issued: 07/21/1998
  • Est. Priority Date: 06/06/1996
  • Status: Expired due to Term
First Claim
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1. A communication payload system comprising:

  • a beam forming network having at least one input port and a plurality of output ports, said at least one input port being mapped to selected output ports, said beam forming network providing an appropriate amplification and phase shift between said at least one input port and said output ports;

    a plurality of amplifiers, each amplifier of said plurality of amplifiers having an input connected to a respective one of said output ports of said beam forming network and an output;

    at least one hybrid matrix having a predetermined number of inputs and a corresponding number of outputs, said predetermined number of inputs of said at least one hybrid matrix being connected to said output of a respective one of said plurality of amplifiers;

    a calibration sample output port connected to one of said outputs of each of said at least one hybrid matrix, said calibration sample output port producing a first calibration sample having a value corresponding to the power output from said hybrid matrix; and

    a calibration system responsive to at least said first calibration sample to generate corrections applied to said beam forming network to maintain the calibration of said payload system.

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