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:
Jan. 20, 1987
Filed:
Jun. 19, 1984
Gary E Evans, Trappe, MD (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A binary Butler matrix is expanded into a non-binary matrix coupled to a like number of non-binary antenna elements for forming multiple beams from a phased array and wherein an n.times.n Butler matrix drives n+l elements, and where the l elements are coupled to predetermined ports of the Butler matrix normally coupled to the n elements but coupled thereto through respective 180.degree. phase shifters such that, for example, the first or (n+1).sub.th element to the right of the n.sub.th element is coupled to the same port of the Butler matrix coupled to the 1st element but additionally through a fixed 180.degree. phase shifter while the first or 0.sub.th element to the left of the 1st element is coupled to the n.sub.th same port coupled to the n.sub.th element but including a respective 180.degree. phase shifter. Progressively increasing numbers of elements on either side of the n elements are respectively coupled to ascending and descending numbered ports of the binary matrix through respective 180.degree. phase shifters, the result being an amplitude taper of the composite beams formed thereby.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile