Methods and apparatus for detecting threats using radar
US7492303B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2006 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Sep 30, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/87
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and apparatus for early detection and identification of a threat such as individuals carrying hidden explosive materials, land mines on roads, etc. are disclosed. One method comprises illuminating a target with radiation at a first polarization, collecting first radiation reflected from the target which has the same polarization as the first polarization, illuminating a target with radiation at a second polarization, and collecting second radiation reflected from the target which has the same polarization as the second polarization. A threat determination is then made based on the difference between the energy values of the first and second collected radiations. In other embodiments, the difference between energy values is used in conjunction with an evaluation of the returned energy in comparison with returned energy from other targets in order to additionally assess whether the primary target is a threat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.