Radar apparatus for detecting an agitated reflective target
US4641138A · kind A · utility
16Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 6, 1975 |
| Grant date | Feb 3, 1987 |
| Priority date | — |
| Expiry date | Nov 6, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/415
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Improved non-cooperative radar apparatus locates and type-classifies an agitated, vibrating reflective target (e.g., a vehicle with its engine running)--whether the target is moving or stationary. A homodyne-type receiver with a cooperating band pass filter extracts a reflected, frequency-shifted energy pattern which identifies the incidence of the agitated target. In accordance with further aspects of the instant invention, the particular energy distribution for the returned, reflected wave is then compared with a stored ensemble of such distributions, or target "signatures", to type-categorize the target.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.