Radio tag communication system

Details Radio tag communication system Radio tag communication system

2004-07-23

2009-02-24

Hofsass, Jeff (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S010200, C340S010300, C340S572700, C235S436000, C235S439000

Reexamination Certificate

active

07495557

ABSTRACT:
A radio tag communication system, when a plurality of RW apparatuses are arranged in such a manner that communication areas of adjacent RW apparatuses overlap one another, makes the polarized waves of the adjacent RW apparatuses orthogonal to each other, and causes the tag to switch the polarization direction with the movement of the tag. This makes it possible to prevent signal interference even when the communication areas are expanded.

REFERENCES:
patent: 2000-013287 (2000-01-01), None
patent: 2001-191919 (2001-07-01), None
patent: 2003-249871 (2003-09-01), None
patent: 2003-283367 (2003-10-01), None

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