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:
Jan. 25, 1977
Filed:
Dec. 05, 1975
George I Tsuda, Fullerton, CA (US);
Hughes Aircraft Company, Culver City, CA (US);
Abstract
A small wavelength antenna comprises a paraboloidal reflector with a rim about its periphery and a single feed dipole, backed by a circular cup-shaped cavity. The reflector, dipole and cavity are symmetrically aligned about the antenna axis. The reflector diameter is on the order of 3 to 4.lambda. and the cavity diameter is less than 1.lambda. and more than 1/2.lambda., where .lambda. is any wavelength with the band of operation of the antenna. The cavity depth is on the order of 0.25 of a selected wavelength within the band, at which maximum pattern symmetry is desired, and the dipole is substantially flush with the open end of the cavity. The rim height is on the order of one-half of a selected wavelength within the band of operation of the antenna at which gain is to be optimized.