Patent ID: 7378971

Claim:
A disc for storing information comprising: a disc structure including a metallized area, said metallized area including an outer metallized data storage area for storing information; a non-metal inner rim area located inside said metallized area; a radio frequency linear dipole antenna placed over a portion of said metallized area and over a portion of said non-metal inner ring area, said radio frequency linear dipole antenna being separated from said metallized area by a non-conductive material located between said radio frequency linear dipole antenna and said metallized area; a radio frequency identification chip electrically coupled to said radio frequency linear dipole antenna; wherein the combination of said linear dipole antenna and said portion of the metallized area overlapped by said linear dipole antenna creates an effective antenna tuned to a predetermined frequency range enabling information from said chip to be transmitted through said effective antenna within said predetermined frequency range associated with said radio frequency identification chip; wherein said radio frequency linear dipole antenna has a length that is shorter than a length otherwise required to tune the radio frequency linear dipole antenna to said predetermined frequency range in the absence of antenna interaction with said metallized area; and wherein said radio frequency linear dipole antenna is straight along its longest axis, said radio frequency linear dipole antenna having a maximum length along it longest axis within the range of 34 mm to 40 mm.