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. 25, 2002
Filed:
Feb. 27, 1998
Victor Allen Vega, Hercules, CA (US);
John H. Rolin, San Jose, CA (US);
Richard Fletcher, Cambridge, MA (US);
Sebastian Thomas Kakkanad, San Jose, CA (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A radio frequency identification tag system ( ) utilizes a radio frequency identification tag ( ) that includes stored information. The tag includes an antenna element ( ) and a common electrode ( ), the common electrode being coupled to ground ( ). The antenna element electrostatically receives an exciter signal ( ) from a proximately-located exciter ( ). Upon receiving the exciter signal, the tag becomes energized, thereby causing it to generate a read signal ( ) based on the stored information. The antenna element then electrostatically sends the read signal to a proximately-located reader ( ), which detects the stored information. Both energy and data are capacitively coupled by virtue of the unbalanced nature of the network, thus resulting in decreased coupled impedance.