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. 07, 1984
Filed:
Apr. 22, 1981
Jean-Pierre Tomasi, Velizy, FR;
U.S. Philips Corporation, New York, NY (US);
Abstract
A method for determining the azimuth .alpha. of a transponder relative to a radar system which transmits a frequency F varying linearly with time. The system comprises two receiving antennas disposed at a distance d from each other and produces two beat signals Fb.sub.1 and Fb.sub.2, formed by mixing the transmitted wave with each of the two echo waves received from the transponder. The phase shift .phi. between Fb.sub.1 and Fb.sub.2 at a first time t, and frequency f, and the phase shift .phi.'.sub.o at a second time t.sub.2 and frequency f.sub.2 is measured, and the overall phase shift .phi. between Fb.sub.1 and Fb.sub.2 is calculated. The value of .alpha. is calculated from the values F.sub.1, d and .phi..