NON-CONTACT WIRELESS COMMUNICATION APPARATUS, METHOD OF ADJUSTING RESONANCE FREQUENCY OF NON-CONTACT WIRELESS COMMUNICATION ANTENNA, AND MOBILE TERMINAL APPARATUS
First Claim
1. A non-contact wireless communication apparatus which receives a power supply from an external device by inductive coupling in a non-contact manner, to transmit/receive a signal with the external device, the non-contact wireless communication apparatus comprising:
- a non-contact wireless communication antenna;
a resonance capacitor, connected in parallel with the non-contact wireless communication antenna, for obtaining a predetermined resonance frequency with the non-contact wireless communication antenna;
resonance frequency adjustment means for changing a resonance capacitance of the resonance capacitor to adjust the resonance frequency;
capacitance change amount control means for controlling an amount of change in resonance capacitance of the resonance capacitor in the resonance frequency adjustment means;
resonance frequency shift means for shifting the resonance frequency of the non-contact wireless communication antenna; and
on/off control means for performing on/off control of the resonance frequency shift means in accordance with the amount of change in the resonance capacitance of the resonance capacitor by the capacitance variation control means.
4 Assignments
0 Petitions
Accused Products
Abstract
A non-contact wireless communication apparatus and a mobile terminal apparatus are provided. The non-contact wireless communication apparatus includes a non-contact wireless communication antenna, a resonance capacitor, connected in parallel with the non-contact wireless communication antenna, for obtaining a predetermined resonance frequency with the non-contact wireless communication antenna, a resonance frequency adjustment unit for changing a resonance capacitance of the resonance capacitor to adjust the resonance frequency, a capacitance change amount control unit for controlling a change in resonance capacitance of the resonance capacitor in the resonance frequency adjustment unit, a resonance frequency shift unit for shifting the resonance frequency of the non-contact wireless communication antenna, and on/off control unit for performing on/off control of the resonance frequency shift unit in accordance with the amount of change in resonance capacitance of the resonance capacitor by the capacitance variation control unit.
257 Citations
10 Claims
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1. A non-contact wireless communication apparatus which receives a power supply from an external device by inductive coupling in a non-contact manner, to transmit/receive a signal with the external device, the non-contact wireless communication apparatus comprising:
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a non-contact wireless communication antenna; a resonance capacitor, connected in parallel with the non-contact wireless communication antenna, for obtaining a predetermined resonance frequency with the non-contact wireless communication antenna; resonance frequency adjustment means for changing a resonance capacitance of the resonance capacitor to adjust the resonance frequency; capacitance change amount control means for controlling an amount of change in resonance capacitance of the resonance capacitor in the resonance frequency adjustment means; resonance frequency shift means for shifting the resonance frequency of the non-contact wireless communication antenna; and on/off control means for performing on/off control of the resonance frequency shift means in accordance with the amount of change in the resonance capacitance of the resonance capacitor by the capacitance variation control means. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of adjusting a resonance frequency of a non-contact wireless communication antenna in a non-contact wireless communication apparatus which receives a power supply from an external device by inductive coupling in a non-contact manner, to transmit/receive signals with the external device, the method comprising:
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adjusting, by a resonance frequency adjustment means, the resonance frequency by changing a resonance capacitance of a resonance capacitor connected in parallel with a non-contact wireless communication antenna and for obtaining a predetermined resonance frequency with the non-contact wireless communication antenna; and on/off controlling, by an on/off control means, a resonance frequency shift means in accordance with an amount of change in the resonance capacitance of the resonance capacitor.
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8. A mobile terminal apparatus including non-contact wireless communication means which receives a power supply from an external device by inductive coupling in a non-contact manner, to transmit/receive signals with an external device, the non-contact wireless communication means comprising:
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a non-contact wireless communication antenna; a resonance capacitor, connected in parallel with the non-contact wireless communication antenna, for obtaining a predetermined resonance frequency with the non-contact wireless communication antenna; resonance frequency adjustment means for changing a resonance capacitance of the resonance capacitor to adjust the resonance frequency; capacitance variation control means for controlling resonance capacitance variation of the resonance capacitor in the resonance frequency adjustment means; resonance frequency shift means for shifting the resonance frequency of the non-contact wireless communication antenna; and on/off control means for performing on/off control of the resonance frequency shift means in accordance with the variation of the resonance capacitance of the resonance capacitor by the capacitance variation control means.
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9. A non-contact wireless communication apparatus which receives a power supply from an external device by inductive coupling in a non-contact manner, to transmit/receive signals with an external device, the non-contact wireless communication apparatus comprising:
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a non-contact wireless communication antenna; a resonance capacitor, connected in parallel with the non-contact wireless communication antenna, for obtaining a predetermined resonance frequency with the non-contact wireless communication antenna; a resonance frequency adjustment unit configured to change a resonance capacitance of the resonance capacitor to adjust the resonance frequency; a capacitance change amount control unit configured to control a change in resonance capacitance of the resonance capacitor in the resonance frequency adjustment means; a resonance frequency shift unit configured to shift the resonance frequency of the non-contact wireless communication antenna; and an on/off control unit configured to perform on/off control of the resonance frequency shift unit in accordance with the change of the resonance capacitance of the resonance capacitor by the capacitance change amount control means. - View Dependent Claims (10)
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Specification