WIRELESS IC TAG READER
First Claim
Patent Images
1. A wireless IC tag reader comprising:
- a receiving antenna with a maximum beam direction and a half-value angle;
a transmitting antenna with a maximum beam direction and a half-value angle narrower than the half-value angle of the receiving antenna; and
a maximum beam direction changing unit that changes the maximum beam direction of the transmitting antenna.
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Accused Products
Abstract
A wireless IC tag reader includes a receiving antenna, a transmitting antenna and a beam direction control unit. The receiving antenna has a maximum beam direction and a half-value angle. The transmitting antenna has a maximum beam direction and a half-value angle narrower than the half-value angle of the receiving antenna. The beam direction control unit changes the maximum beam direction of the transmitting antenna.
18 Citations
6 Claims
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1. A wireless IC tag reader comprising:
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a receiving antenna with a maximum beam direction and a half-value angle; a transmitting antenna with a maximum beam direction and a half-value angle narrower than the half-value angle of the receiving antenna; and a maximum beam direction changing unit that changes the maximum beam direction of the transmitting antenna. - View Dependent Claims (2, 3, 4, 5)
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6. A wireless IC tag reader comprising:
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a receiving antenna with a maximum beam direction and a half-value angle; transmitting antennas each with a maximum beam direction and a half-value angle narrower than the half-value angle of the receiving antenna; and a maximum beam direction changing unit that changes the maximum beam directions of the transmitting antennas so that the maximum beam directions differ from each other.
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Specification