| abstract |
An RFID device (10), such as an RFID tag or label, includes a magnetic coupler (12) between an interposer or strap (16), and an antenna (20). The interposer or strap includes a transponder chip (26), and an interposer magnetic coupling element (28) that is operatively coupled to the transponder. An antenna portion magnetic coupling element (22) is operatively coupled to the antenna. The magnetic coupling elements together constitute a magnetic coupler that is used to magnetically couple the transponder chip of the interposer to the RFID antenna. A high permeability material (30) may be used to enhance the magnetic coupling between the magnetic coupling elements. The magnetic coupling elements single-turn conductive loops or multiple-turn coils. The magnetic coupler may function as a transformer, with the voltage across the antenna transformed to a different voltage across the transponder chip, and vice versa. |