Stealth aircraft identification system
US5808577A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 31, 1996 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | May 31, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2013/029
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention is an identification friend or foe system for an aircraft providing identification information when illuminated by an incident radar signal. In detail, the system includes at least a portion of the aircraft's surface incorporating magnetic material for absorption of at portion of the incident radar signal with the remainder reflected and scattered back in the direction of the incident radar signal. A electromagnetic coil assembly) is positioned behind the aircraft skin and is used to impress a biasing field on a portion of the aircraft's surface incorporating the magnetic material such that the biasing field modulates the reflected and scattered signal. A system is coupled to the coil assembly to modulate the biasing field such that the reflected and scattered signal from the portion of the aircraft's surface incorporating the magnetic material is modulated with an encoded signal incorporating the identification information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.