Patent ID: 11934502
Assignee: nan
Field: Digital communication (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. An RF communication device equipping with a biometric sensor and preventing physical antenna hacking, the RF communication device comprising:
a power supply unit;
an RF communication unit including:
a processor connected to the power supply unit,
a biometric sensor connected to the processor,
a memory connected to the processor and storing biometric information,
an RF driving switch connected to the processor,
an RF communication module connected to the RF driving switch in series to form a closed circuit with the RF driving switch, and a first RF antenna, and
a physical hacking determination unit connected to the RF driving switch of the RF communication unit to periodically exchange data for verification,
wherein the physical hacking determination unit deletes at least one of the biometric information stored in the memory and a unique ID stored in the RF communication module when communication of the verification data is disconnected or an abnormal signal is received,
wherein the power supply unit comprises:
a first power supply unit including:
a second RF antenna,
an RF harvesting power conversion unit converting an RF induced power excited by the second RF antenna into power, and
a super capacitor storing and outputting the power produced by the RF harvesting power conversion unit;

a second power supply unit including a battery;
an RF contact determination unit detecting whether conversion from the RF induced power to the power in the RF harvesting power conversion unit has occurred; and
a dual power switching device connected to input terminals of the first power supply unit and the second power supply unit, receiving a signal of the RF contact determination unit as a switching signal, and selectively outputting any one of power of the first power supply unit and the second power supply unit,
wherein the processor of the RF communication unit is connected to an output terminal of the dual power switching device,
wherein, when the dual power switching device receive the switching signal indicating that power conversion has occurred in the RF harvesting power conversion unit, from the RF contact determination unit, the dual power switching device outputs power of the first power supply unit to the RF communication unit,
wherein, before the dual power switching device receive the switching signal indicating that the power conversion has occurred in the RF harvesting power conversion unit, from the RF contact determination unit, the dual power switching device outputs power of the second power supply unit to the RF communication unit,
wherein when the RF communication device is in proximity to or contact with an RF reader such that the RF communication device communicates with the RF reader, the RF harvesting power conversion unit converts the RF induced power generated by the RF reader into the power, the power supply from the second power supply unit is cut off, and the first power supply unit operates and supplies the power to the RF communication device, and
wherein when RF communication is cut off due to a distance where the RF communication device cannot communicate with the RF reader, the RF harvesting power conversion unit is not driven, so the first power supply unit does not operate, and the second power supply unit supplies the power to the RF communication device.