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. 31, 2001
Filed:
Oct. 21, 1977
William W. Shrader, Stow, MA (US);
Vilhelm Gregers Hansen, Framingham, MA (US);
Raytheon Company, Lexington, MA (US);
Abstract
A radar system including a main antenna and a smaller auxiliary antenna, the main antenna having a radiation pattern with a main lobe and relatively small sidelobes, and the auxiliary antenna having an omnidirectional radiation pattern. A received signal in the sidelobes of the main antenna and the corresponding received signal of the auxiliary antenna are spectrally divided by sets of bandpass filters with the signals of corresponding ones of the bandpass filters being processed to null out a signal such as a jamming signal received via a sidelobe of the main antenna pattern. The processing includes inphase and quadrature detection of a partially cancelled signal with the resulting complex error signal being applied as a modulation of the signal of the auxiliary antenna to be subtracted from the signal of the main antenna to produce the cancelled sidelobe signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile