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:
Mar. 17, 2009
Filed:
Apr. 25, 2007
Nuttawit Surittikul, Ann Arbor, MI (US);
Kwan-ho Lee, Ann Arbor, MI (US);
Wladimiro Villarroel, Worthington, OH (US);
Nuttawit Surittikul, Ann Arbor, MI (US);
Kwan-ho Lee, Ann Arbor, MI (US);
Wladimiro Villarroel, Worthington, OH (US);
AGC Automotive Americas R&D, Inc., Ypsilanti, MI (US);
Abstract
A patch antenna receives circularly polarized RF signals from a satellite. The antenna includes a radiating element. A plurality of feed lines feed the radiating element at a plurality of feed points. The feed points are spaced apart to generate a circularly polarized radiation beam solely in a higher order mode at a desired frequency. The antenna may include a plurality of parasitic structures. The feed point spacing and/or the parasitic structures tilt the radiating beam away from an axis perpendicular to the radiating element. Thus, the patch antenna provides excellent RF signal reception from satellites at low elevation angles.