Multi-band RFID encoder

Details Multi-band RFID encoder Multi-band RFID encoder

2008-03-11

2008-03-11

Trieu, Van T. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S572400, C340S572800

Reexamination Certificate

active

07342499

ABSTRACT:
In one embodiment, a multi-band near-field antenna for an RFID encoder includes a substrate; an internal coil antenna defined within the substrate; an annular ground plane defined on a first surface of the substrate; a second ground plane defined on an opposing second surface of the substrate, wherein the annular ground plane and the second ground plane form a Faraday cage for the internal coil antenna; and a second antenna disposed on the opposing second surface within the annulus defined by the annular ground plane.

REFERENCES:
patent: 5861019 (1999-01-01), Sun et al.
patent: 6667725 (2003-12-01), Simons et al.
patent: 6822528 (2004-11-01), Dawn et al.
patent: 2006/0255945 (2006-11-01), Egbert
patent: 2007/0040680 (2007-02-01), Chiu

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