Method and apparatus for identifying a set of multiple items...

Details Method and apparatus for identifying a set of multiple items... Method and apparatus for identifying a set of multiple items...

2007-04-03

2007-04-03

Paik, Steven S. (Department: 2876)

Registers

Systems controlled by data bearing records

Inventory

C235S451000, C235S492000

Reexamination Certificate

active

10601903

ABSTRACT:
A three dimensional (3D) radio frequency antenna is positioned on one side of a conveyor which has a movable part for moving items, each of which has a radio frequency transponder, into and out of the antenna such that the items when in the antenna are completely surrounded by the antenna. The 3D antenna includes a plurality of coils which provide a 3D reading field in which all transponders in the reading field may be interrogated and also includes noise compensation coils at opposite ends of the reading field to minimize electromagnetic radiation from the antenna and also minimize noise from external sources. The radio frequency transponder includes a housing, a substrate within the housing, an integrated circuit and a printed circuit board mounted on the substrate. A coil is mounted on the substrate such as to be spaced therefrom with the spacing of the coil from the substrate enabling the encapsulant to completely surround the coil.

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patent: 1 041 504 (2000-10-01), None
patent: 02/31789 (2002-04-01), None

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