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. 30, 1996
Filed:
Mar. 29, 1995
Myles P Murphy, Annandale, NJ (US);
Lionel N Menegozzi, Annandale, NJ (US);
Albert C Harding, Stockholm, NJ (US);
ITT Corporation, New York, NY (US);
Abstract
A hybrid amplitude/phase comparison direction finding system for aircraft, employing a unique calibration system to compensate for tolerance variations in the antennas. The calibration system utilizes a programmable read only memory (PROM) for each antenna pair, wherein calibration data from pre-measured antenna patterns of the associated antennas are stored. The calibration data preferably includes measured relative amplitude (electromagnetic field strength) and phase data, as a function of frequency and angle from a common reference plane, for the associated antenna pair. This calibration data is stored in a PROM which is preferably disposed within an assembly which includes the antenna pair. A system processor can then retrieve the calibration data during system operation, whereupon angle of arrival measurements can be performed with improved accuracy.