With the rapid development of Internet of Things technology, the application of electronic tags has been involved in various fields. Today we will briefly understand the difference between UHF and high-frequency RFID electronic tags in the application.
High-frequency RFID tags
The typical operating frequency is 13.56MHz, generally passive, and the tag must be located in the near-field region of the RFID reader antenna radiation when the tag is exchanged with data. The reading distance of high-frequency tags is generally less than 1 meter.
High-frequency tags are widely used in electronic tickets, electronic ID cards, electronic locking and anti-theft (electronic remote control door lock controllers), community property management, building access control systems, etc. because they can be easily made into cards.
The operating frequency is between 860MHz and 960MHz, which can be divided into two categories: active tags and passive tags. When working, the RF tag is located in the far field area of the antenna radiation field of the UHF reader, and the coupling method between the RFID tag and it is electromagnetic coupling.
The UHF reader antenna radiation field provides RF energy for passive tags and wakes up passive tags. The reading distance of the corresponding radio frequency identification system is generally greater than 1 meter, typical 4 meters to 6 meters, and the maximum can reach more than 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. Due to the long reading distance and fast transmission data rate, UHF tags are widely used in automatic identification of railway vehicles, container identification, and can also be used
Road vehicle identification and automatic toll collection system
The two have different characteristics
1. High-frequency tags are cheaper than ultra-high-frequency tags, save energy, penetrate non-metallic objects with strong force, and the working frequency is not subject to radio frequency regulation, which is most suitable for objects with high water content, such as fruits.
2. UHF has a wide range of action and fast data transmission speed, but they are more energy-consuming, weak penetration, and the operation area cannot have too much interference, which is suitable for monitoring items transported from the seaport to the warehouse. Moreover, the price of UHF systems is higher, generally about 10 times that of high-frequency systems.
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High-frequency RFID tags