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Fast 3D positioning based on a simplified THz photonic stereo ISAR system
Applied Optics
|January 16, 2024
Summary
A novel terahertz (THz) stereo inverse synthetic aperture radar (ISAR) system uses photonics for high-resolution 3D target positioning. This system achieves millimeter-level accuracy for multiple targets, demonstrating its potential for advanced imaging applications.
Area of Science:
- Photonics
- Terahertz (THz) technology
- Radar systems
Background:
- Traditional radar systems face limitations in achieving high-resolution 3D positioning.
- Photonics offers novel methods for signal generation and processing in radar applications.
Purpose of the Study:
- To propose and experimentally demonstrate a THz stereo ISAR scheme based on photonics.
- To achieve high-resolution and fast 3D positioning of multiple targets.
Main Methods:
- Photonically generating a linear frequency-modulation (LFM) signal at 300-320 GHz using an optical frequency comb and a uni-traveling carrier photodiode.
- Employing two incoherent measurements at different angles with a single pair of antennas for 3D positioning.
- Utilizing a THz stereo inverse synthetic aperture radar (ISAR) configuration.
Main Results:
- Successful 3D positioning of plane reflectors over a 0.6 m distance.
- Achieved a resolution of 7.5 mm for both range and azimuth dimensions.
- Demonstrated a maximum experimental height error of 4 mm.
Conclusions:
- The proposed THz stereo ISAR scheme based on photonics is experimentally validated.
- The system achieves high-resolution and fast 3D positioning capabilities.
- This technology shows promise for advanced target localization and imaging.
