Noncontact communication apparatus and noncontact communication method
First Claim
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1. A noncontact communication apparatus comprising:
- an antenna resonance circuit configured to have a coil for communicating with an opposite party through electromagnetic coupling;
changing means for changing a Q-factor of said antenna resonance circuit; and
control means for controlling said antenna resonance circuit to transmit and receive data to and from said opposite party at one of a plurality of communication speeds prepared beforehand, said control means further controlling said changing means to reduce said Q-factor the higher the communication speed in use.
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Abstract
A noncontact communication apparatus is disclosed which includes: an antenna resonance circuit configured to have a coil for communicating with an opposite party through electromagnetic coupling; a changing block configured to change a Q-factor of the antenna resonance circuit; and a control block configured to control the antenna resonance circuit to transmit and receive data to and from the opposite party at one of a plurality of communication speeds prepared beforehand, the control block further controlling the changing block to reduce the Q-factor the higher the communication speed in use.
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Citations
11 Claims
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1. A noncontact communication apparatus comprising:
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an antenna resonance circuit configured to have a coil for communicating with an opposite party through electromagnetic coupling; changing means for changing a Q-factor of said antenna resonance circuit; and control means for controlling said antenna resonance circuit to transmit and receive data to and from said opposite party at one of a plurality of communication speeds prepared beforehand, said control means further controlling said changing means to reduce said Q-factor the higher the communication speed in use. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A noncontact communication method for use with a noncontact communication apparatus including an antenna resonance circuit configured to have a coil for communicating with an opposite party through electromagnetic coupling, and changing means for changing a Q-factor of said antenna resonance circuit, said noncontact communication method comprising the steps of:
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controlling said antenna resonance circuit to transmit and receive data to and from said opposite party at one of a plurality of communication speeds prepared beforehand; and controlling said changing means to reduce said Q-factor the higher the communication speed in use.
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Specification