Patent ID: 6265977
Filing Date: 2001-07-24
Classification: G06K,Y10S,Y10T

Abstract:
A radio frequency identification (RFID) device comprising:a substrate having a first surface and a second surface;a first antenna element disposed on the first surface of the substrate;a second antenna element disposed on the first surface of the substrate and electrically isolated from the first antenna element;a circuit that is electrically connected with the first antenna element and the second antenna element; andan adhesive on at least a portion of one of the first antenna element, second antenna element, circuit and first surface of the substrate,wherein the circuit includes a power circuit that produces a supply voltage from voltage differences between the first and second antenna elements, andwherein the circuit is coupled to the first and second antenna elements by an interposer comprising:an interposer substrate;a first connecting pad disposed on the interposer substrate;a second connecting pad disposed on the interposer substrate and electrically isolated from the first connecting pad; andwherein the circuit is coupled to the first and second connecting pads and the first and second connecting pads are coupled to the first and second antenna elements, respectively.