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Photonic-Assisted Digital Radar System

  • US 20130016004A1
  • Filed: 04/16/2012
  • Published: 01/17/2013
  • Est. Priority Date: 04/15/2011
  • Status: Active Grant
First Claim
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1. A photonic-assisted digital radar system (1) comprising:

  • an active electronically-scanned antenna (2);

    a transmitting section (3) connected to the antenna (2) and configured to generate and transmit RF signals (SF1) via the antenna (2); and

    a receiving section (4) connected to the antenna (2) and configured to receive and process electric analog signals (SE2) associated to received RF signals (SF2);

    the transmitting section (3) comprising;

    a waveform generator (5) configured to generate an electric modulating signal in the form of a pulsed waveform (SWG); and

    a modulator (6) configured to receive an electric transmission carrier (STALO) and the electric modulating signal (SWG) and to modulate the transmission carrier (STALO) by means of the modulating signal (SWG), thereby generating a radiofrequency signal (SF1) to be transmitted via the antenna (2);

    characterized in that the receiving section (4) comprises;

    photonic-assisted analog-to-digital converting means (8) configured to convert electric analog signals (SE2) into corresponding electric digital signals (SED); and

    digital signal processing means (9) configured to receive and process the electric digital signals (SED);

    wherein the photonic-assisted analog-to-digital converting means (8) comprises;

    a mode-locked laser device (11) configured to generate an optical clock signal (SS); and

    electronic analog-to-digital converting means (13);

    the electronic analog-to-digital converter means (13), the waveform generator (5), the modulator (6) and the digital signal processing means (9) being configured to operate based on respective electric clock signals (CK3),(CK1),(CK2),(CK4) generated based on the optical clock signal (SS).

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