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Focal plane array for THz imager and associated methods

  • US 6,943,742 B2
  • Filed: 02/16/2004
  • Issued: 09/13/2005
  • Est. Priority Date: 02/16/2004
  • Status: Active Grant
First Claim
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1. A high-frequency imaging system, comprising:

  • a high frequency lens configured to form an image of an object at a focal plane, the object emitting electromagnetic radiation at a first frequency above the microwave band of the electromagnetic spectrum;

    a local oscillator configured to generate an electromagnetic beam at a second frequency, the second frequency being higher than the first frequency; and

    a plurality of dual-frequency antennas being arrayed to an effective length to receive the electromagnetic radiation at the first frequency, and configured to receive the electromagnetic beam at the second frequency, the dual frequency antennas configured to permit intermodulation of the first and second frequency generating a signal of a third frequency corresponding to the difference between the first and second frequencies, the signal representing the image.

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