RFID tag

Details RFID tag RFID tag

2008-01-29

2008-01-29

Mullen, Thomas (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C343S741000, C343S866000, C343S878000

Reexamination Certificate

active

07323994

ABSTRACT:
An RFID tag which has improved radiation/reception characteristics when used in proximity to the human body, and has an antenna which, when stacked with a 13 MHz band RFID tag, does not have an effect on the loop antenna of that tag. An RFID tag assembly comprises a first RFID tag having a coiled loop antenna and a second RFID tag superposed on the first RFID tag, the second RFID tag comprising an antenna formed by a metal member which covers at least a portion of a surface of a dielectric substrate, an electronic part mounted on the metal member, and a member which is provided with the overlapped coiled loop antenna of the first RFID tag housed in the end thereof so as to cover a portion of the antenna formed by the metal member.

REFERENCES:
patent: 5392028 (1995-02-01), Pichl
patent: 5751256 (1998-05-01), McDonough et al.
patent: 5972156 (1999-10-01), Brady et al.
patent: 6840440 (2005-01-01), Uozumi et al.
patent: 6999028 (2006-02-01), Egbert
Mitsuru Muramato, Nozomu Ishii and Kiyohiko Itoh,Characteristics of a Small Planar Loop Antenna, Dec. 1997, pp. 1818-1822, IEEE Transactions On Antennas and Propagation, vol. 45, No. 12.

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