Wireless communication device
First Claim
Patent Images
1. A wireless communication device comprising:
- an antenna configured to carry out a wireless communication with a communication object;
a carrier wave transmitting unit configured to transmit via the antenna a carrier wave to a communication object located in a communication ready area from the antenna as a base point, the carrier wave serving to render the communication object to generate electric power for the communication;
a carrier wave control unit configured to periodically control the carrier wave transmitted from the carrier wave transmitting unit in a temporary off manner.
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Accused Products
Abstract
A reader/writer of a wireless communication device transmits a carrier signal from an antenna, and if there is not response from an IC card within a preset time after transmitting the polling command, the carrier signal is temporarily controlled to an OFF state.
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Citations
19 Claims
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1. A wireless communication device comprising:
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an antenna configured to carry out a wireless communication with a communication object;
a carrier wave transmitting unit configured to transmit via the antenna a carrier wave to a communication object located in a communication ready area from the antenna as a base point, the carrier wave serving to render the communication object to generate electric power for the communication;
a carrier wave control unit configured to periodically control the carrier wave transmitted from the carrier wave transmitting unit in a temporary off manner. - View Dependent Claims (2, 3, 4)
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5. A wireless communication device comprising:
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a plurality of antennas configured to carry out a wireless communication with a communication object;
a switching unit configured to switch over between the plurality of antennas;
a carrier wave transmitting unit configured to transmit via the switched-over antenna a carrier wave to a communication object located in a communication ready area from the switched-over antenna as a base point, the carrier wave serving to render the communication object to generate electric power for the communication;
a carrier wave control unit configured to periodically control the carrier wave transmitted from the carrier wave transmitting unit in a temporary off manner. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A wireless communication device comprising:
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an antenna configured to carry out a wireless communication with a communication object;
a carrier wave transmitting unit configured to transmit via the antenna a carrier wave to a communication object located in a communication ready area from the antenna as a base point, the carrier wave having a level exceeding a threshold level that can render the communication object to generate electric power for the communication; and
a carrier wave control unit configured to periodically set the level of the carrier wave transmitted from the carrier wave transmitting unit temporarily lower than the threshold level. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification