Passive radar is an innovative technology that detects objects by analyzing how existing environmental signals like FM radio and digital TV broadcasts bounce off targets, rather than transmitting its own signals. This approach eliminates the need for expensive transmitters and broadcast licenses while still leveraging core radar principles like Doppler shift and signal delay for object detection and tracking. The system measures frequency changes and time differences to determine object position and velocity.
Background
Traditional radar systems require dedicated transmitters to send out signals and analyze their reflections, but passive radar represents an alternative approach that leverages existing radio frequency emissions in the environment. This technology has gained attention for its cost-effectiveness and stealth capabilities in both civilian and military applications.
- Source
- Lobsters
- Published
- Apr 11, 2026 at 07:32 PM
- Score
- 6.0 / 10