IC-tag read-write apparatus
First Claim
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1. A radio data communication apparatus, comprising;
- a circuit unit configured to perform data read and write operations relative to an IC tag; and
at least one antenna unit each configured to have an antenna and to conduct a predetermined signal modulation to a first signal to be transmitted through the antenna by radio transmission to a specific IC tag in the data write operation and a predetermined signal demodulation to a second signal received through the antenna from the specific IC tag in accordance with the data read operation, each one of the at least one antenna unit being arranged at a position separated from the circuit unit,wherein the circuit unit comprisesan oscillating circuit configured to generate a carrier wave having a specific frequency, anda control circuit configured to synchronize the carrier wave and a data signal and output the carrier wave and the data signal in synchronism with each other,wherein the antenna unit comprisesa signal modulation circuit configured to modulate the carrier wave and the data signal with the predetermined signal modulation to generate the first signal to be transmitted through the antenna in the data write operation and to demodulate the second signal received through the antenna in the data read operation.
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Abstract
A radio data communication apparatus includes a circuit unit and at least one antenna unit. The circuit unit performs data read and write operations relative to an IC tag. Each antenna unit has an antenna and conducts a predetermined signal modulation to a first signal to be transmitted through the antenna by radio transmission to a specific IC tag in the data write operation. Also, each antenna unit conducts a predetermined signal demodulation to a second signal received through the antenna from the specific IC tag in accordance with the data read operation. The antenna unit is arranged at a position separated from the circuit unit.
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Citations
36 Claims
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1. A radio data communication apparatus, comprising;
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a circuit unit configured to perform data read and write operations relative to an IC tag; and at least one antenna unit each configured to have an antenna and to conduct a predetermined signal modulation to a first signal to be transmitted through the antenna by radio transmission to a specific IC tag in the data write operation and a predetermined signal demodulation to a second signal received through the antenna from the specific IC tag in accordance with the data read operation, each one of the at least one antenna unit being arranged at a position separated from the circuit unit, wherein the circuit unit comprises an oscillating circuit configured to generate a carrier wave having a specific frequency, and a control circuit configured to synchronize the carrier wave and a data signal and output the carrier wave and the data signal in synchronism with each other, wherein the antenna unit comprises a signal modulation circuit configured to modulate the carrier wave and the data signal with the predetermined signal modulation to generate the first signal to be transmitted through the antenna in the data write operation and to demodulate the second signal received through the antenna in the data read operation. - View Dependent Claims (2, 3, 4, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 31, 32, 33)
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5. A radio data communication apparatus comprising:
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a circuit unit configured to perform data read and write operations relative to an IC tag; and at least one antenna unit each configured to have an antenna and to conduct a predetermined signal modulation to a first signal to be transmitted through the antenna by radio transmission to a specific IC tag in the data write operation and a predetermined signal demodulation to a second signal received through the antenna from the specific IC tag in accordance with the data read operation, each one of the at least one antenna unit being arranged at a position separated from the circuit unit, wherein the circuit unit outputs a data signal and a carrier wave together included in the first signal to the antenna unit in the data write operation and retrieves data from the second signal after the predetermined signal demodulation performed by the antenna unit in the data read operation, wherein the antenna unit comprises; a signal transmitter configured to transmit signals from the antenna unit to the circuit unit; an antenna configured to transmit the first signal and receive the second signal; a frequency multiplication circuit configured to multiply at a predetermined multiplication ratio a frequency of the carrier wave transmitted together with the data signal from the circuit unit; and a signal modulation circuit configured to modulate the carrier wave output from the frequency multiplication circuit and the data signal with the predetermined signal modulation to generate the first signal to be transmitted through the antenna in the data write operation and to demodulate the second signal received through the antenna in the data read operation. - View Dependent Claims (6, 7, 8, 9, 30)
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34. An apparatus comprising:
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a function component configured to perform a predetermined function and provided with an IC tag; and a radio data communication unit comprising; a circuit unit configured to perform data read and write operations relative to the IC tag; and an antenna unit configured to have an antenna and to conduct a predetermined signal modulation to a first signal to be transmitted through the antenna by radio transmission to a specific IC tag in the data write operation and a predetermined signal demodulation to a second signal received through the antenna from the specific IC tag in accordance with the data read operation, the antenna unit being arranged at a position separated from the control circuit, wherein the circuit unit comprises an oscillating circuit configured to generate a carrier wave having a specific frequency, and a control circuit configured to synchronize the carrier wave and a data signal and output the carrier wave and the data signal in synchronism with each other, wherein the antenna unit comprises a signal modulation circuit configured to modulate the carrier wave and the data signal with the predetermined signal modulation to generate the first signal to be transmitted through the antenna in the data write operation and to demodulate the second signal received through the antenna in the data read operation. - View Dependent Claims (35, 36)
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Specification