Patent ID: 8469281

Claim:
A RFID structure comprising: a loop antenna assembly having a stand-alone resonant frequency of f 1 above or below a standardized reader frequency range, the loop antenna including an antenna track, and at least two contact pads; an antenna substrate supporting the loop antenna assembly; and a shielding layer parallel with a plane defined by the antenna substrate, the loop antenna assembly in combination with the shielding layer having a resonant frequency of f 2 below the standardized reader frequency range, wherein the shielding layer includes a plurality of shielding material segments, each shielding material segment being spaced apart from adjacent shielding material segments, the spaces created by etching or punching gaps in the shielding layer, wherein, if positioned against a metallic surface, the loop antenna assembly in combination with the shielding layer has a resonant frequency within the standardized reader frequency range.