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Reduction of local oscillator spurious radiation from phased array transmit antennas

  • US 6,411,256 B1
  • Filed: 05/16/2001
  • Issued: 06/25/2002
  • Est. Priority Date: 05/16/2001
  • Status: Active Grant
First Claim
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1. An antenna transmitting a signal to a coverage area, comprising:

  • a beamformer having a plurality of elemental paths;

    a plurality of upconverters, each upconverter having a first input coupled to an output of a corresponding elemental path of the beamformer, and each upconverter having a second input receiving an oscillator signal;

    a plurality of radiating elements, each radiating element coupled to an output of a corresponding upconverter; and

    at least one phase adjustment device coupled to at least one of the upconverters at the second input, wherein each phase adjustment device adjusts the phase of the oscillator signal provided to the corresponding upconverter in such a manner so as to substantially spread a leakage transmission of the oscillator signal beyond the coverage area.

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