Title: Fixed beam radar with dual range light display providing both range and azimuth information

Abstract: A radar principally for use on small vehicles such as sailboats, utilizing a fixed antenna which provides a continuous forward looking beam and has a dual range display providing range and limited azimuth information. Separate antenna elements are utilized to receive echoes in the paths of left and right radar beams respectively, these left and right beams being slightly to the left and right of the boresight of the radar antenna. Utilizing digital techniques, the video representing radar echoes received in the left and right beams is gated in proper time sequence corresponding to target range, to a series of indicator lights for left and right range display respectively. These indicator lights each represent a different target range and are excited in accordance with video signals received in the left and right beams respectively. The indicator lights vary in their intensity so as to indicate whether targets are to the left or right of the antenna boresight and thus to the left or right of the heading of the vehicle. The indicator lights thus indicate both the range and relative azimuth of targets ahead of the boat.

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Inventors: Greene, Leonard M. (Chappaqua, NY, US)

Application Number: 517164
Filing Date: 1974-10-23
Publication_date: 1976-05-04
Assignee: Safe Flight Instrument Corporation (White Plains, NY)
Primary Class(es): 342/136 342/139
Other Classes:
US Patent Ref:

2939135	May, 1960	Beckerich et al.	343/16.
3035262	May, 1962	Vantin, Jr.	343/13.
3087151	Apr, 1963	Vantin, Jr.	343/13.
3173137	Mar, 1965	Byrne	343/6.
3229245	Jan, 1966	Hurdle et al.	343/13.
3274592	Sep, 1966	Crane	343/16.
3725937	Apr, 1973	Schreiber	343/16.
3849779	Nov, 1974	Boyd	343/16.

Other Refs:
Primary Examiner: Hubler, Malcolm F.
Assistant Examiner:
Attorney: Sokolski; Edward A.