Title: Radar system

Abstract: Tracking of a target by a radar possessing electronically controlled nutan (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 radar's angle-tracking capabilities are minimized.

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Inventors: Felsenthal, Jr., Harry D. (Camarillo, CA, US)

Application Number: 810037
Filing Date: 1969-03-24
Publication_date: 1976-03-30
Assignee: The United States of America as represented by the Secretary of the Navy (Washington, DC)
Primary Class(es): 342/16 342/78
Other Classes:
US Patent Ref:

2464258	Mar, 1949	Prichard	343/18.
3243804	Mar, 1966	Smit, Jr.	343/16.
3268893	Aug, 1966	Hauer	343/16.
3277468	Oct, 1966	Caspers	343/7.
3281837	Oct, 1966	Van Hijfte	343/18.
3419868	Dec, 1968	Clayto, Jr.	343/16.

Other Refs:
Primary Examiner: Hubler, Malcolm F.
Assistant Examiner:
Attorney: Sciascia; Richard S., St.Amand; Joseph M., Murray, Jr.; Howard J.