The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 15, 1989
Filed:
Dec. 14, 1987
Alan F Dadds, Hartfield, GB;
U.S. Philips Corporation, New York, NY (US);
Abstract
In, for example, a passive direction-finding radio receiver employing a multi-beam antenna which has e.g. ninety-six feeds which form a corresponding number of overlapping reception beams, the output signal amplitudes of the various feeds can be compared with a reference to yield a sequence of binary digits, e.g. as shown in FIG. 2. The position of a radio source is given by the position in the sequence of the center of the largest group of '1's. In order to quickly determine this position the sequence is subjected repeatedly to a processing operation in which each '1' which does not have '1's as its two immediate neighbors is changed to a '0', thereby repeatedly stripping the two end '1's off each group of '1's until none remain. The required position is that of the single '1' or pair of '1's present immediately before all have become '0's.