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:
Jun. 27, 2006
Filed:
Mar. 12, 2004
Curt Carrender, Morgan Hill, CA (US);
Paul S. Drzaic, Morgan Hill, CA (US);
Robert Martin, San Jose, CA (US);
Gregory P. Katterhagen, Gilroy, CA (US);
John M. Price, Morgan Hill, CA (US);
Curt Carrender, Morgan Hill, CA (US);
Paul S. Drzaic, Morgan Hill, CA (US);
Robert Martin, San Jose, CA (US);
Gregory P. Katterhagen, Gilroy, CA (US);
John M. Price, Morgan Hill, CA (US);
Alien Technology Corporation, Morgan Hill, CA (US);
Abstract
According to an embodiment of the invention, a patch antenna includes a patch coupled to a ground plane. The ground plane includes a first and second strip line. When the first strip line is activated, the antenna generates a signal having a first polarization, and when the second strip line is activated, the antenna generates a second polarization. The first polarization may be a horizontal polarization, and the second polarization may be a vertical polarization. The antenna may be incorporated into a radio frequency identification (RFID) interrogator, which may be used to read RFID tags attached to individual items.