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:
Feb. 24, 1976
Filed:
Apr. 24, 1974
Matthew Fassett, Billerica, MA (US);
Quirino Balzano, Pembroke Pines, FL (US);
Raytheon Company, Lexington, MA (US);
Abstract
A cylindrical array antenna is disclosed wherein rows of antenna elements disposed about the periphery of the antenna each include a feed network coupled to a monopulse arithmetic unit through a radial line power divider and a hemispherical sector selector switching network. Monopulse 'sum' and circumferential 'difference' patterns are obtained by dividing a selected hemispherical sector into four adjacent antenna aperture segments. The antenna elements associated with alternate antenna aperture segments are coupled to the arithmetic unit in like polarity and the antenna elements associated with adjacent antenna aperture segments are coupled to such arithmetic unit in opposite polarity. With such arrangement cross-polarization or 'null filling' effects associated with the cylindrical array antenna are reduced.