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:
Apr. 10, 1990
Filed:
Jun. 05, 1989
Applicant:
Inventors:
Jeffrey F Bull, Warrington, PA (US);
Richard P Flam, Doylestown, PA (US);
Assignee:
Allied-Signal Inc., Morristown, NJ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01Q / ; H01Q / ; H01Q / ;
U.S. Cl.
CPC ...
342373 ; 342372 ;
Abstract
A method of operating a circular array antenna, Butler matrix, phase shifters and beam forming network is described including a control circuit or computer algorithm for modifying the phase of the phase shifters, one at a time, and measuring the output power received or transmitted by the circular array antenna to estimate the gradient of the output power. The invention overcomes the problem of nulling out interfering signals by modifying the beam pattern of the antenna in certain directions while maintaining the beam pattern in preferred directions for receiving desired signals.