Accession Number:

ADD002704

Title:

Radar System.

Descriptive Note:

Patent,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s):

• Felsenthal,Harry D. , Jr

Report Date:

1976-03-30

Pagination or Media Count:

8.0

Abstract:

Tracking of a target by a radar possessing electronically controlled nutation conical scan is difficult when the target employs pulse jamming techniques, since pulsing of the jammer at or near the nutation frequency causes the radar to break lock on the target. In the present concept, the lobing reference signals for azimuth and elevation are periodically reversed in phase, the reversals of the two signals bearing a quadrature relationship to one another. By thus reversing the direction of nutation in synchronism with the radar pulse-rate switching signal, the deleterious effects of countermeasures on the radars angle-tracking capabilities are minimized.

Descriptors:

• *Radar tracking
• *Radar antijamming
• *Patents
• Conical scanning
• Phase shift
• Modulation
• Spurious effects

Subject Categories:

• Radar Countermeasures
• Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE