Can
RFID readers be universal?
RFID readers can only be used interchangeably if they have the same frequency band and support the same protocol. They cannot be used interchangeably if they have the same frequency band but support different protocols.
Can
RFID readers be universal?
At present,
RFID readers are commonly used in high-frequency and ultra-high frequency products. High frequency and ultra-high frequency are suitable for different frequency bands. The frequency band used for high-frequency is mainly 13.56mhz, while ultra-high frequency supports a wider range of frequency bands due to more standards, mainly concentrated between 860-960mhz.
1. High frequency
The protocols mainly used by high-frequency (HF)
RFID readers include multiple international standards such as ISO18000-3, ISO15693, ISO14443A/B. The reading distance of high-frequency tags is generally less than 1 meter, which is suitable for scenarios where the recognition distance is close and the reading quantity requirement is small.
The usage scenarios of different protocols are different. For example, ISO14443A is generally used for private purposes, such as membership consumption
Cards; ISO14443B is used for public purposes, such as ID
Cards, due to its good encryption properties.
At present, high-frequency
RFID products are widely used in electronic tickets, electronic ID
Cards, electronic locking anti-theft (electronic remote control door lock controllers), community property management, building access control systems, etc.
2. Ultra-high frequency
The standards for ultra-high frequency readers are not so uniform, and the frequencies used in different countries are also different. The ultra-high frequency designated by the European Union is 865-868MHz, while the United States is 902-928MHz, India is 865-867MHz, Australia is 920-926MHz, and Japan is 952-954MHz. However, countries such as China have not yet provided a suitable frequency range for ultra-high frequency and are in a state of missing standards.
Different standards for ultra-high frequency apply to different frequency bands, such as the ISO/IEC 18000-6 standard, which is applicable to the ultra-high frequency band of 860MHz to 960MHz; The ISO/IEC 18000-7 standard is applicable to ultra-high frequency 433.92MHz; The EPC Gen2 standard is applicable for 860MHz~960MHz.
Ultra high frequency can be divided into two categories: active tags and passive tags. During operation, the RF tag is located in the far-field region of the reader antenna radiation field, and the coupling between the tag and the reader is electromagnetic coupling. The radiation field of the reader antenna provides radio frequency energy for passive tags, awakening them. The reading distance of the corresponding
RFID system is generally greater than 1 meter, with a typical range of 4-6 meters and a maximum of over 10 meters. Reader antennas are generally directional antennas, and only RF tags within the directional beam range of the reader antenna can be read/written. Ultra high frequency tags are mainly used for automatic recognition of railway vehicles and containers, and can also be used for highway vehicle recognition and automatic toll collection systems.
Whether an
RFID reader is universal or not depends on the frequency band and protocol. As long as the selected
RFID reader supports the same frequency band and protocol as the tag we want to read, the reader can read universal. Otherwise, it cannot read universal.
