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Electro optical microwave communications system

  • US 7,092,645 B1
  • Filed: 12/13/2002
  • Issued: 08/15/2006
  • Est. Priority Date: 12/13/2002
  • Status: Active Grant
First Claim
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1. An electro optic microwave communications system comprising a receiver for receiving a high frequency microwave transmitted signal said receiver comprising:

  • an antenna to receive the transmitted signal and to provide a received signal;

    a photomixer connected to the antenna to provide an injection signal to mix with the received signal to down convert the received signal to an intermediate frequency (IF) signal;

    a fixed laser that illuminates the photomixer at a first frequency;

    a tunable laser that illuminates the photomixer at a second frequency; and

    at least one fiberoptic cable that connects the fixed laser and the tunable laser to the photomixer;

    wherein said photomixer mixes the fixed laser and the tunable laser to provide the injection signal at frequency equal to the difference of the first frequency and the second frequency.

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