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:
Sep. 09, 2014
Filed:
Feb. 02, 2009
Andrew Reginald Weily, Epping, AU;
Yingjie Jay Guo, Epping, AU;
Ian Maxwell Davis, Bella Vista, AU;
John Seward Kot, North Narrabeen, AU;
Andrew Reginald Weily, Epping, AU;
Yingjie Jay Guo, Epping, AU;
Ian Maxwell Davis, Bella Vista, AU;
John Seward Kot, North Narrabeen, AU;
Commonwealth Scientific and Industrial Research Organisation, Campbell, AU;
Abstract
A circularly polarized array antenna () is disclosed. A single layer dielectric substrate () has a ground plane () located on its upper surface of the substrate and covering only part of the upper surface. A plurality of antenna elements (-) are also located on said upper surface of the substrate. Each antenna element has a slot element (-) formed in the ground plane and a respective loading element (-) located within each slot element. The antenna elements being arranged in a regular array where each respective slot element is sequentially rotated in space with respect to adjacent slot elements, and the loading elements generate a perturbation under excitation. A microstrip feed network () is located on the underside of the substrate to provide excitation to each slot element, and including feeds of different lengths to be electrically sequentially rotated in common with spatial rotation of the slot elements. A single microstrip feed point () extends to the edge of the substrate for connection purposes. A reflecting plane is located parallel to and spaced apart from the underside of the substrate. The ground plane extends to cover the entire microstrip feed array.