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. 23, 2013
Filed:
Mar. 04, 2010
Alfred R. Lopez, Commack, NY (US);
Alfred R. Lopez, Commack, NY (US);
BAE Systems Information and Electronic Systems Integration Inc., Nashua, NH (US);
Abstract
GPS reception on helicopters and ground vehicles may be subject to varying near-ground interference. A compact antenna includes vertically spaced arrays of radiating elements. The first array provides a basic reception pattern. The second array provides a pattern having a distinctive low elevation angle phase reversal. By combining signals for these patterns an antenna pattern with a low angle onmidirectional elevation null characteristic is provided to suppress near-ground interference. Prior to combining, signals from the second array may be modified in amplitude or phase, or both, on a semi-permanent basis, or may be adaptively modified on an active basis, in order to adjust the null characteristic. Antennas and methods are described.