IC tag communication system
First Claim
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1. An IC tag communication system comprising:
- a pair of reader antennas which are disposed so as to be opposed to each other, and which receive radio waves emitted from an IC tag attached to an article, the radio waves being at least partly overlapped with each other;
a plurality of readers which are connected respectively to the reader antennas; and
a phase adjustment section for adjusting the phases of radio waves transmitted by the pair of reader antennas so as to reinforce, at a central location, the radio waves transmitted by the pair of reader antennas,wherein the radio waves transmitted by the pair of reader antennas at least partly overlap with each other at the central location.
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Abstract
An IC tag communication system according to an aspect of the present invention includes: a plurality of reader antennas which receive radio waves emitted from an IC tag attached to an article, the radio waves being at least partly overlapped with each other; a plurality of readers which are connected respectively to the reader antennas; and a phase adjustment section for adjusting the phases of the radio waves that the reader antennas receive to each other.
10 Citations
9 Claims
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1. An IC tag communication system comprising:
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a pair of reader antennas which are disposed so as to be opposed to each other, and which receive radio waves emitted from an IC tag attached to an article, the radio waves being at least partly overlapped with each other; a plurality of readers which are connected respectively to the reader antennas; and a phase adjustment section for adjusting the phases of radio waves transmitted by the pair of reader antennas so as to reinforce, at a central location, the radio waves transmitted by the pair of reader antennas, wherein the radio waves transmitted by the pair of reader antennas at least partly overlap with each other at the central location. - View Dependent Claims (2, 3, 4)
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5. An IC tag communication system comprising:
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a pair of reader antennas which are disposed so as to be opposed to each other, and which receive radio waves from IC tags attached to a plurality of articles arranged on a shelf, the radio waves being at least partly overlapped with each other; a plurality of readers connected respectively to the reader antennas; and a phase adjustment section for adjusting the phases of radio waves transmitted by the pair of reader antennas so as to each reinforce, at a central location, the radio waves transmitted by the pair of reader antennas, wherein the radio waves transmitted by the pair of reader antennas at least partly overlap with each other at the central location. - View Dependent Claims (6, 7, 8, 9)
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Specification