Abstract: A transponder comprises a first polymer layer. A radio frequency (“RF”) transponder is affixed to the first polymer layer, wherein the RF transponder includes a processor in electrical communication with a graphene-based antenna. A second polymer layer is formed on the first polymer layer and the RF transponder. The first polymer layer and second polymer layer form an encasement around the RF transponder. The encasement has a hermeticity of about 10?7 to about 10?12 atm·cc/sec. The encasement provides improved impact, temperature, vibration, chemical, and/or corrosion protection to the RF transponder.

Abstract: Embodiments of the present invention relate to a symmetrical printed radio frequency identification antenna and method of forming a radio frequency identification antenna. In one embodiment, the radio frequency identification antenna comprises a loop element having a plurality of sides. A first conductive element is in electrical communication with the loop element. A second conductive element is in electrical communication with the loop element. The first conductive element includes an integrated circuit pad. The first and second conductive elements extend in opposite directions substantially from a middle portion of a side included in the plurality of sides. The loop, first conductive element, and second conductive element are electrically conductive. The second conductive element includes a quadrilateral portion. The second conductive element has a width that is at least about the length of the side included in the plurality of sides.

Abstract: A transponder comprises a first polymer layer. A radio frequency (“RF”) transponder is affixed to the first polymer layer, wherein the RF transponder includes a processor in electrical communication with a graphene-based antenna. A second polymer layer is formed on the first polymer layer and the RF transponder. The first polymer layer and second polymer layer form an encasement around the RF transponder. The encasement has a hermeticity of about 10?7 to about 10?12 atm·cc/sec. The encasement provides improved impact, temperature, vibration, chemical, and/or corrosion protection to the RF transponder.

Abstract: Embodiments of the present invention relate to radio transponders and radio transponder antenna inlays. In an embodiment, a radio transponder comprises an integrated circuit having a memory unit. A printed antenna inlay is in electrical communication with the integrated circuit. The antenna inlay comprises a non-metallic conductive compound. The antenna inlay is non-ferromagnetic. The antenna inlay is radiolucent at wavelengths of at least 0.01 nm. The antenna inlay has a thickness of about 0.8 ?m to about 150 ?m.