Integrated NFC UHF RFID Chip Dynamic Circuit Control
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Solution Overview
Problem
Current NFC cards using the ISO 14443 protocol have limitations in communication distance and energy consumption, making them less suitable for long-range communication and more expensive compared to those using the ISO 15693 protocol, which has better communication distance but lacks efficient power management.
Innovation Solution
A radio-frequency-based communication apparatus with integrated NFC and UHF components, including an antenna, NFC and EPC radio frequency modules, and processing modules, that dynamically control power consumption based on communication distance and protocol, allowing for efficient energy use and enhanced security through shared encryption modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If NFC cards use ISO 14443 protocol with CPU circuit, then security level is improved, but cost and energy consumption increase
Solution Approach 1:
The patent implements dynamic circuit suppression technology that selectively activates or deactivates specific circuits based on communication distance and protocol requirements. When communicating under ISO 15693 protocol at longer distances, the CPU circuit is suppressed and only the logic circuit operates, reducing energy consumption while maintaining security through the logic circuit's encryption/decryption capabilities.
Solution Approach 2:
The system changes operational parameters by switching between different circuit configurations based on communication requirements. For ISO 14443 protocol (short range), the CPU circuit is activated for high-security operations. For ISO 15693 protocol (longer range), the system switches to logic circuit only mode, changing the operational state to optimize energy consumption while maintaining adequate security.
2Reliability
If NFC cards use ISO 14443 protocol with CPU circuit, then security level is improved, but cost increases
Solution Approach 1:
The patent implements dynamic circuit suppression technology that selectively activates or deactivates specific circuits based on communication distance and protocol requirements. When communicating under ISO 15693 protocol at longer distances, the CPU circuit is suppressed and only the logic circuit operates, reducing energy consumption while maintaining security through the logic circuit's encryption/decryption capabilities.
Solution Approach 2:
The system changes operational parameters by switching between different circuit configurations based on communication requirements. For ISO 14443 protocol (short range), the CPU circuit is activated for high-security operations. For ISO 15693 protocol (longer range), the system switches to logic circuit only mode, changing the operational state to optimize energy consumption while maintaining adequate security.
3Use of energy by moving object
If NFC cards use logic circuit instead of CPU circuit, then cost and energy consumption are reduced, but security level decreases
Solution Approach 1:
The patent implements dynamic circuit suppression technology that selectively activates or deactivates specific circuits based on communication distance and protocol requirements. When communicating under ISO 15693 protocol at longer distances, the CPU circuit is suppressed and only the logic circuit operates, reducing energy consumption while maintaining security through the logic circuit's encryption/decryption capabilities.
Solution Approach 2:
The system changes operational parameters by switching between different circuit configurations based on communication requirements. For ISO 14443 protocol (short range), the CPU circuit is activated for high-security operations. For ISO 15693 protocol (longer range), the system switches to logic circuit only mode, changing the operational state to optimize energy consumption while maintaining adequate security.
4Area of moving object
If separate NFC and UHF modules are integrated, then chip area is reduced, but device complexity increases
Solution Approach 1:
The patent integrates NFC and UHF communication modules into a single chip, sharing common components such as the antenna, RF front-end, and encryption/decryption units. This merging reduces overall chip area and component count while maintaining the functional independence of both communication protocols through dynamic circuit suppression technology.
Solution Approach 2:
The patent creates a multi-functional integrated chip that can operate under both ISO 14443/NFC and ISO 15693/UHF protocols. The chip includes universal components that serve both functions, such as a shared antenna system, common RF modulation/demodulation circuits, and dual-purpose encryption/decryption units, enabling one chip to perform multiple communication roles.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus achieves cost-effective, long-range communication with improved security by integrating NFC and UHF functions, reducing chip area and power consumption while maintaining high security standards, making it suitable for anti-counterfeit applications.
Implementation Method 1
NFC is a short-range high-frequency radio technology, and runs in a distance of 20 centimeters (cm) at a 13.56 MHz frequency
Implementation Method 2
The NFC radio frequency module outputs first information satisfying a first near field communication protocol based on a 13.56 MHz radio frequency signal from the antenna
Data Source
AI summary
This disclosure relates to radio frequency identification (RFID)-based communications technologies. In one aspect, a radio-frequency-based communications apparatus includes an antenna, a near field communication (NFC) radio frequency module and an electronic product code (EPC) radio frequency module separately connected to the antenna, an NFC processing module connected to the NFC radio frequency module, and an EPC processing module connected to the EPC radio frequency module. The NFC radio frequency module and the NFC processing module are configured to process signals transmitted according to one or more predetermined NFC protocols. The EPC radio frequency module and the EPC processing module are configured to process signals transmitted according to one or more predetermined EPC protocols.