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Published on: May 1, 2018
Metasurface-Enabled Active-Like Passive Radar
Mingyi Li1, Jiawen Xu1, Hanting Zhao2
1State Key Laboratory of Photonics and Communications, Peking University, Beijing, China.
Summary
Metasurface-enabled passive radars (MEPRs) overcome limitations of traditional passive radar systems. This novel approach enhances object detection and tracking in cluttered environments without source control.
Area of Science:
- Electromagnetics and Metamaterials
- Radar Systems Engineering
- Wireless Communication
Background:
- Passive radars (PRs) offer cost-effective object detection by utilizing existing wireless signals.
- Conventional PRs face challenges with unknown source waveforms, interference, and detecting slow targets.
Purpose of the Study:
- To introduce a novel metasurface-enabled passive radar (MEPR) concept.
- To enable interference suppression, signal enhancement, and accurate target localization without source control.
Main Methods:
- Integration of a space-time-coding programmable metasurface into a passive radar system.
- Imprinting distinct spatiotemporal tags onto ambient wireless wavefields.
- Proof-of-concept implementation and real-time testing at 5.48 GHz.
Main Results:
- Demonstrated real-time imaging and tracking of unmanned aerial vehicles.
- Achieved performance comparable to active radar systems.
- Successfully operated under interference-rich conditions.
Conclusions:
- MEPR technology transforms passive radar into an active-like sensing platform.
- MEPR offers a scalable, adaptive, and energy-efficient solution for next-generation sensing.
- This technology is foundational for integrated sensing and communication systems.
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