Radio communication device, radio communication method and non-contact IC card reader/writer device
First Claim
1. A radio communication device capable of communicating with a plurality of kinds radio communication media having different resonant frequencies, comprising:
- a modulation circuit for modulating transmission data;
an output line circuit for outputting signals modulated by the modulation circuit;
a transmission/reception antenna for transmitting the signals from the output line circuit to the radio communication media and receiving signals from the radio communication media;
an input line circuit for inputting signals from the transmission/reception antenna;
a phase control circuit for controlling phases of signals from the input line circuit; and
a demodulation circuit for demodulating an output from the phase control circuit;
wherein the phase control circuit controls its own resonant frequency to a second resonant frequency which is different from a first resonant frequency of the transmission/reception antenna, tuned to and resonated with resonant frequencies of the radio communication media and which is not resonated with the resonant frequencies of the radio communication media.
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Accused Products
Abstract
A radio communication device of an example of the present invention is one capable of communicating a plurality kinds of radio communicating media having different resonant frequencies comprises a transmission unit having a first resonant frequency tuned to and resonated with the resonant frequencies of the radio communication media in a prescribed communication range with the radio communication media to transmit signals to the radio communication media and a reception unit having a second resonant frequency not resonated with the resonant frequencies of the radio communication media in the prescribed communication ranges with the radio communication media to receive signals from the radio communication media.
18 Citations
6 Claims
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1. A radio communication device capable of communicating with a plurality of kinds radio communication media having different resonant frequencies, comprising:
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a modulation circuit for modulating transmission data; an output line circuit for outputting signals modulated by the modulation circuit; a transmission/reception antenna for transmitting the signals from the output line circuit to the radio communication media and receiving signals from the radio communication media; an input line circuit for inputting signals from the transmission/reception antenna; a phase control circuit for controlling phases of signals from the input line circuit; and a demodulation circuit for demodulating an output from the phase control circuit; wherein the phase control circuit controls its own resonant frequency to a second resonant frequency which is different from a first resonant frequency of the transmission/reception antenna, tuned to and resonated with resonant frequencies of the radio communication media and which is not resonated with the resonant frequencies of the radio communication media. - View Dependent Claims (2, 3, 4)
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5. A non-contact IC card reader/writer device for performing transmission and reception of data to and from an IC card, comprising:
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a transmission circuit for modulating transmission data to the IC card; an antenna unit having a first resonant frequency tuned to and resonated with a resonant frequency of the IC card in a prescribed communication range with the IC card to transmit an output from the transmission circuit; a phase control circuit for inputting a reception signal from the IC card received through the antenna unit to perform phase control, so as not to be resonated to the resonant frequency of the IC card in a prescribed communication range with the IC card; a reception circuit for demodulating an output from the phase control circuit as reception data; and a control unit for performing transmission and reception of the data to and from the IC card through the transmission circuit and the reception circuit to perform a prescribed data processing. - View Dependent Claims (6)
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Specification