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. 14, 2004
Filed:
Jan. 23, 2003
Gerard King, Reading, GB;
Jamie Stokes, Reading, GB;
Channel Master Limited, Theale Berkshire, GB;
Abstract
The present invention relates to antenna feeds ( ) for use in linear or circularly polarised systems. In one embodiment of the invention, a cross-type antenna feed ( ) comprises a cylindrical metal waveguide housing ( ) and a cross-type metal feed body ( ) coupled to the front of the waveguide housing ( ). The feed body ( ) has four peripherally spaced corrugated arm portions ( ) arranged in a mutually orthogonal relationship, where the arm portions ( ) extend radially outwardly from a longitudinal axis ( ) of the feed body ( ). Ridges ( ) on each arm portion ( ) are arranged concentrically around the axis ( ) and parallel thereto, with successive ridges spaced from the axis ( ) in a tiered arrangement. In another embodiment the antenna feed is a dielectric lens. The antenna feed is used in an antenna system having a reflector antenna in addition or in a low noise block (LNB) receiver.