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. 15, 2009
Filed:
Dec. 10, 2007
Michael Camp, Celle, DE;
Martin Fischer, Pfedelbach, DE;
Michael Camp, Celle, DE;
Martin Fischer, Pfedelbach, DE;
Atmel Automotive GmbH, Heilbronn, DE;
Abstract
An antenna for a backscatter-based RFID transponder is provided with an integrated receiving circuit, having a capacitive input impedance, for receiving a radio signal lying spectrally in an operating frequency range, whereby the antenna has two antenna arms, which extend outward in a spiral from a central region in which the antenna arms can be connected to the integrated receiving circuit. According to the invention, a ring-shaped trace is provided, which extends completely around the central region and is formed to connect the antenna arms conductively to one another. The invention relates further to a backscatter-based RFID transponder with an antenna of this type.