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System and method for modulating a signal at an antenna

  • US 8,340,197 B2
  • Filed: 11/25/2008
  • Issued: 12/25/2012
  • Est. Priority Date: 02/28/2008
  • Status: Active Grant
First Claim
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1. A direct spatial antenna modulation (DSAM) system comprising:

  • a radiating structure comprising a plurality of spatial points of origination, wherein a unique data symbol is associated with one or more of the plurality of spatial points of origination;

    a common feed point for receiving an excitation signal; and

    a switching system responsive to a baseband data signal, wherein in response to the presence of the unique data symbol in the baseband data signal, the switching system directs the excitation signal to the one or more spatial points of origination associated with the particular unique data symbol, and wherein the one or more spatial points of origination associated with the unique data symbol determine a characteristic of a signal emitted by the radiating structure.

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