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. 09, 2008
Filed:
Oct. 17, 2005
Gholamreza Zeinolabedin Rafi, Kitchener, CA;
Safieddin Safavi-naeini, Waterloo, CA;
Sujeet K. Chaudhuri, Heidelberg, CA;
Wai-cheung Tang, Mannhein, CA;
Gholamreza Zeinolabedin Rafi, Kitchener, CA;
Safieddin Safavi-Naeini, Waterloo, CA;
Sujeet K. Chaudhuri, Heidelberg, CA;
Wai-Cheung Tang, Mannhein, CA;
Mark IV Industries Corp., Ontario, CA;
Abstract
A multi-band antenna for multi-band radio frequency telecommunications. The multi-band antenna includes a conductive patch separated from a ground plane by a dielectric material. A slot pattern formed in the conductive patch defines a perimeter substantially surrounding two feed pins and arranged symmetrically about a center line. The slot pattern includes one or more inwardly extending arms projected along axes that pass between the two feed pins. The axes may be parallel to the center line. The slot pattern may be arranged using folded slots. In one embodiment, circular polarization is realized at GPS frequency by using one feed pin and linear or circular polarization is realized by using one or two feed pins for other bands. The feed pins may be controlled independently without a fixed phase and amplitude arrangement necessary to achieve a fixed polarization (linear, circular, or elliptical), which allows for adaptive pattern and polarization agility.