Patent ID: 8228236
Filing Date: 2012-07-24
Classification: G06K,H01Q

Abstract:
1. A Radio Frequency Identification (RFID) device, comprising: an inverted F antenna having an active portion, a ground plane spaced from the active portion, and a feed coupled to and coplanar with the active portion; an RFID controller coupled to the feed; a battery coupled to the RFID controller and in direct electrical communication with the ground plane, wherein the RFID device is configured to respond to an interrogator using backscatter communication; wherein the active portion and the ground plane lie on parallel planes; wherein the battery is positioned on a plane located between the active portion and the ground plane; wherein the inverted F antenna is designed to match an impedance of the controller; wherein an extent of the ground plane in a direction parallel to its plane is greater than an extent of the active portion in a direction parallel thereto.