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Area of Science:

  • Photonics and Radar Systems Engineering
  • Radio Detection and Ranging (RADAR)
  • Optical Engineering

Background:

  • Next-generation radar requires software-defined radio (SDR) for adaptability and higher frequencies for smaller antennas and better resolution.
  • Current digital microwave components limit bandwidth and introduce noise at higher frequencies, necessitating analogue up- and downconversion.
  • Photonics offer high precision and ultrawide bandwidth for flexible radio-frequency (RF) signal generation and direct digitization.

Purpose of the Study:

  • To develop and demonstrate a fully photonics-based coherent radar system.
  • To overcome the limitations of current electronic radar components using photonic technologies.
  • To validate the performance of a photonics-based radar in a real-world field trial.

Main Methods:

  • Utilized a single pulsed laser for both generating tunable radar signals and receiving echoes.
  • Developed a photonics-based architecture that avoids radio-frequency up- and downconversion.
  • Conducted field trials to test the coherent radar demonstrator's performance.

Main Results:

  • The photonics-based radar demonstrator achieved high resolution and precision.
  • System performance exceeded state-of-the-art electronics at carrier frequencies above two gigahertz.
  • Successfully detected non-cooperating aeroplanes, confirming system effectiveness.

Conclusions:

  • A fully photonics-based coherent radar system is feasible and effective.
  • Photonics provide a viable solution for next-generation software-defined radar systems.
  • The developed system offers superior performance compared to electronic systems at higher frequencies.