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:
Dec. 06, 2005
Filed:
Nov. 02, 2001
Masaru Ogawa, Aichi-ken, JP;
Kazuo Sato, Aichi-ken, JP;
Kunitoshi Nishikawa, Aichi-ken, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi-gun, JP;
Denso Corporation, Kariya, JP;
Abstract
A feed probe (), a semicylindrical sub-reflector () forming a primary radiator together with the feed probe (), and a main reflector () arranged such that mirror surfaces of said main reflector () and the sub-reflector face across the feed probe () are all disposed on a ground plate (a recfector face) (). The main reflector () has a predetermined focal point or focal line on which the feed probe () is located, and is mounted on the ground plate () at a predetermined installation angle θ. A converter () for converting linearly and circularly polarized waves is provided on the mirror surface of the main reflector (). The converter () is composed of a plurality of grooves () and ridges () formed between the grooves, so that a wave component orthogonal to the grooves is reflected at the bottom of the grooves while a wave component parallel to the grooves is reflected on the ridge surface, thereby causing a phase difference according to the height H of the grooves when a radio wave is reflected on the main reflector to thereby perform linear to circular polarization conversion.