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. 03, 1976
Filed:
Nov. 21, 1974
Manfred Bohm, Stuttgart, DT;
International Standard Electric Corporation, New York, NY (US);
Abstract
A surface based direction finder for determining the direction of radiations from a remote station (aircraft for example), using a plural element linear or circular receiving antenna array. The arriving energy phases are measured in at least one element group with two element pairs, (for example) the elements of each pair being equally spaced and aligned so that a line joining elements of even ordinal number is parallel to the line joining the elements with odd ordinal numbers. The amplitudes (m1, m2, m3 and m4) and the phases (.alpha.1, .alpha.2) of the rf signal picked up by each element are measured separately and the phase .beta. of the desired wave is determined by computer solution of the typical equation derived from the law of consines;