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Related Experiment Video

Updated: Jun 11, 2025

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Photonics-Based Multifunction System for Radar Signal Transmit-Receive Processing and Frequency Measurement.

Dengcai Yang1, Ya Zhang1, Feng Yang1

  • 1School of Physics and Optoelectronic Engineering, Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China.

Micromachines
|September 28, 2024
PubMed
Summary

A new photonic-assisted radar system enables multifunctional capabilities including frequency-doubled LFM signal generation and self-interference cancellation. This advanced radar offers improved performance for applications like UAVs and automotive systems.

Keywords:
de-chirp receptionfrequency measurementmicrowave photonicsmultifunction systemself-interference cancellation

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Area of Science:

  • Photonics
  • Radar Systems Engineering
  • Signal Processing

Background:

  • Traditional radar systems face limitations in achieving multifunctional capabilities within compact form factors.
  • Integrating advanced signal processing techniques like photonic assistance is crucial for next-generation radar.

Purpose of the Study:

  • To propose and experimentally validate a novel photonic-assisted multifunctional radar system.
  • To demonstrate simultaneous LFM signal generation, de-chirp reception, self-interference cancellation, and frequency measurement.

Main Methods:

  • Photonic frequency doubling to generate a high-frequency, broadband local oscillator (LO) signal.
  • Photonic-assisted self-interference cancellation during de-chirp reception.
  • Microwave frequency measurement based on IF electrical filter envelope response time.

Main Results:

  • Achieved a 12-18 GHz LFM signal using photonic frequency doubling.
  • Demonstrated over 12.1 dB interference reduction with photonic-assisted self-interference cancellation for a 6 GHz LFM bandwidth.
  • Attained a frequency measurement resolution better than 14 MHz in the 12.14-18.14 GHz range.

Conclusions:

  • The proposed photonic-assisted radar system integrates multiple functions efficiently.
  • The system's design is suitable for miniaturized, continuous-operation radar in UAVs, automotive applications, and close-range sensing.
  • Significant simplification of radar system structure and reduced space occupation were achieved.