Dual rfid antenna

An antenna structure, comprising:

• a substantially flat coiled metal trace configured to provide low resistance and high quality factor (Q) for operation in a first HF mode;
• and
• a gap disposed between adjacent sections of the coiled metal trace configured to allow UHF and/or SHF coupling between the adjacent sections for operation in a second UHF or SHF mode,
• wherein respective ends of the metal trace are configured to suitably couple to a first RFID chip for operation in the first HF mode;
• and
• wherein a section of the metal trace is configured to suitably couple to a second RFID chip for operation in the second UHF or SHF mode.

A method of employing a single antenna to support multiple radio devices, the method comprising:

• providing a substantially flat coiled metal trace operative to provide low resistance and high Q for operation in a first radio band;
• the providing comprising maintaining a gap disposed between adjacent sections of the coiled metal trace, wherein the gap is dimensioned to allow coupling between the adjacent sections which enables operation in a second radio band;
• selectively electrically coupling opposing ends of the metal trace to a first radio frequency chip for operation in the first radio band;
• and
• selectively electrically coupling a section of the metal trace to a second radio frequency chip for operation in the second radio band.