Patent ID: 8866616
Filing Date: 2014-10-21
Classification: G06K,H01Q

Abstract:
1. An radio frequency identification (RFID) tag, the tag comprising: a substrate having a first surface and a second surface opposite to the first surface, the substrate defining a plane of the tag; a conductive element disposed on the first surface of the substrate; an RFID integrated circuit disposed on the second surface of the substrate; and an antenna having an antenna pattern, the antenna disposed on the second surface of the substrate and in electrical communication with the RFID integrated circuit, the antenna having a first clockwise dipole element forming a first spiral and a second counterclockwise dipole element forming a second spiral, the antenna and the conductive element arranged to generate a radiation pattern having a maximum gain along an axis that is substantially coplanar with the plane of the tag that is greater than a maximum gain along an axis that is substantially orthogonal to the plane of the tag, the radiation pattern exhibiting a null substantially orthogonal to the plane of the tag.