Radio-frequency tag communication system

Details Radio-frequency tag communication system Radio-frequency tag communication system

2007-11-12

2011-10-18

Bugg, George (Department: 2612)

Communications: electrical

Selective

Interrogation response

C340S010400, C340S572400, C340S572700, C342S147000, C342S155000, C343S757000

Reexamination Certificate

active

08040222

ABSTRACT:
A radio-frequency tag communication system including (a) a radio-frequency tag, (b) a radio-frequency tag communication device configured to transmit a transmitted signal toward the radio-frequency tag, and to receive a reply signal transmitted from the radio-frequency tag in response to the transmitted signal, for thereby effecting radio communication with the radio-frequency tag, and (c) at least one reference tag disposed fixedly in an area of communication of the radio-frequency tag communication system and configured to transmit a reply signal in response to the transmitted signal, for thereby effecting radio communication with the radio-frequency tag communication device, and wherein the radio-frequency tag communication device includes a directivity control portion configured to control a directivity of communication with the radio-frequency tag, on the basis of a result of the radio communication of the radio-frequency tag communication device with the at least one reference tag.

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