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:
Mar. 27, 2001
Filed:
Jul. 13, 1999
Shady H. Suleiman, Wilmington, CA (US);
Charles W. Chandler, San Gabriel, CA (US);
TRW Inc., Redondo Beach, CA (US);
Abstract
An antenna feed horn (,) for a satellite antenna array that includes multiple chokes (,) that provide effective control of the horn aperture mode content to generate radiation patterns which substantially have equal E-plane and H-plane beamwidths, low cross-polarization, low axial ratio, and suppressed sidelobes. The chokes (,) are annular notches that have both radial and axial dimensions. Two chokes (,) are provided at an internal transition location between a conical profile section (,) and a cylindrical aperture section (,). Additionally, another choke (,) is provided in the aperture (,) of the horn (,), and two additional chokes (,) are provided proximate the aperture (,). The size and location of the chokes (,) are optimized for the desirable mode content at the frequency band of interest to allow the propagation modes to be properly phase oriented relative to each other so that the useful bandwidth of the signal is on the order of 10% or greater.