Radio frequency identification tag apparatus and related method

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;
• and
• an 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, and
• wherein 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;
• and
• wherein 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.