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:
Aug. 16, 1977
Filed:
Oct. 08, 1975
Applicant:
Inventors:
James S Ajioka, Fullerton, CA (US);
George I Tsuda, Fullerton, CA (US);
Assignee:
Hughes Aircraft Company, Culver City, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01Q / ; H01Q / ;
U.S. Cl.
CPC ...
343795 ; 343797 ; 343816 ; 343840 ;
Abstract
An antenna feed system having a very wide (multi-octave) bandwidth. The antenna feed comprises a plurality of nested annular cavities each parasitically excited by a pair of orthogonal two-point fed dipoles. The frequency selective properties of the dipoles and the annular cavities in conjunction with the focal distribution of the reflector or lens with which the feed is used results in a multiplexing of sub-bands across the total bandwidth. A modification of the end members of the two-point fed dipoles permits dual-plane and dual polarization monopulse operation of the feed system.