RFID comes in three types – low-frequency RFID, high-frequency RFID and ultra-high frequency RFID. But what is the difference between each type and what are the advantages of each?
What is the Difference Between Low, High and Ultra High-Frequency RFID Systems?
RFID is an abbreviation of “Radio Frequency Identification”. It allows for automatic identification of an item using radio waves. The possibilities of RFID systems are endless and it is far more effective than older forms of identification like barcodes. An RFID tag is basically an aerial with a small microchip attached to it. The microchip can store data about an item, for example, its location or a serial number. You will find RFID in use across a range of industries, from manufacturing to libraries. It can be used for real-time tracking, logistics management, inventory control and much, much more.
Active RFID vs Passive RFID
Last week we covered the two most widely used RFID types: Active and Passive. Active RFID tags are self-powered, with a larger communication distance and more memory. Passive RFID tags are powered by the reader, making them cheaper. Another way to break down RFID systems is by the frequency at which they operate: low frequency, high frequency and ultra-high frequency.
Low-Frequency RFID Systems
Low-Frequency RFID can penetrate most materials, such as water or even body tissue, making it an ideal solution for the identification of animals. LF RFID Tags can be easily applied to any non-metallic item can be read at a range of about 10cm. The data transfer rate is slower, and it can be affected by electrical interference.
High-Frequency RFID Systems
High-frequency RFID is not as effective as low frequency when water and body tissue gets in the way, but it is less affected by electrical interference so more suitable for industrial environments. HF RFID systems are popular in ticketing systems, and the data transfer is higher so a reader can read more than 50 tags per second at a range of 10cm to 1 metre.
Ultra-High Frequency RFID Systems
Ultra-high frequency RFID is used where a longer read range is required. UHF RFID has a read range of up to 12m, a much faster data rate it works well in difficult environments.
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