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:
Jul. 20, 1976
Filed:
Nov. 13, 1974
Robert Nicholas Alcock, Reigate, EN;
Richard Paul Vincent, Crawley, EN;
Stephen Joseph Robinson, South Godstone, EN;
U.S. Philips Corporation, New York, NY (US);
Abstract
A vertical radio-interferometer sector-definition system, using an array of aerial elements which are arranged in a vertical straight line and are symmetrically disposed about the center of the array, which is unaffected by ground-reflected indirect-path signals. If .theta. is the angle of arrival, by a direct path, of a signal and p is the ground reflection coefficient, then from a symmetrical pair of aerial elements is derived a product of two functions f.sub.1 (.theta.).f(p) and from another symmetrical pair is derived another product f.sub.2 (.theta.).f(p): division of one product by the other 'cancels out' f(p) to provide a quotient signal which is a function of .theta. but not of p. Either or both product functions may be derived with or without the aid of a central element.