RADAR SYSTEMS
Assignee
PLESSEY OVERSEAS LIMITED
Filed
Oct 31, 1985
Granted
Jun 4, 1991
Location
HAMPSHIRE EN GB
Abstract
A radar system comprises a radar carrier frequency oscillator for producing a radar carrier signal, a receiver including a mixer for producing Doppler signals, a Doppler filter bank and an alarm circuit, including a series of Doppler bins, having an alarm threshold level. The radar system is provided with a frequency modulator for modulating the radar carrier signal and any interference signal received by the receiver whereby the bandwidth of the frequency modulated interference signal exceeds the bandwidth of a number of Doppler filters in the Doppler filter bank. The alarm circuit may have two threshold levels and may be controlled in dependence upon a predetermined pattern of crossings of the threshold levels.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
May 7, 1987
Rescinded
Jan 19, 1990
Duration
2 years, 8 months
Inventor
- 1DAVID L. HURD
Record Details
- Patent number
- US 5021791
- Application
- 06809862
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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