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System for response to a signal transmitted by a radar and use of this system notably for testing radars, in particular of the MTI type

  • US 8,487,809 B2
  • Filed: 12/21/2010
  • Issued: 07/16/2013
  • Est. Priority Date: 12/23/2009
  • Status: Active Grant
First Claim
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1. A system for response to a signal transmitted by a radar, comprising:

  • a passive antenna configured to receive and then backscatter a signal transmitted by the radar;

    a microwave switch connected to said antenna;

    at least two microwave lines each having a distinct impedance and being connected to the microwave switch, wherein two successive microwave lines of the at least two microwave lines have a length difference equal to λ

    /2, where λ

    is a wavelength of the signal received by the antenna; and

    a generator configured to generate a parametrizable control signal and send the parametrizable control signal to the microwave switch so that the microwave switch switches onto one or the other of the at least two microwave lines, so as to modulate the signal backscattered by said antenna.

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