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Differences Between UHF and HF RFID Electronic Tags in Application

With the rapid development of Internet of Things technology, the application of electronic tags has been involved in various fields. Today, let's briefly know about the differences between UHF and HF RFID tags in application:

The typical working frequency of HF RFID tags is 13.56MHz, and HF RFID tags are mainly passive tags. When the tag is exchanged with the reader, the tag must be located in the near field region of the antenna radiation field of the RFID reader. The reading range of HF tags is generally less than 1 meter. HF tags are widely used in electronic tickets, electronic ID cards, electronic locking anti-theft (electronic remote control door lock controller), community property management, building access control system, etc.

The working frequency of UHF tags is between 860MHz and 960MHz, which can be divided into active tags and passive tags. The RFID tag is located in the far-field region of the antenna radiation field of the UHF reader in the operation, and the coupling mode between the RFID tag and the reader is electromagnetic coupling. The antenna radiation field of UHF readers provides RF energy for the passive tags and wakes the passive tags. The reading range of the corresponding RFID system is generally greater than 1 meter, and the typical reading range is 4-6 meters, and the maximum reading range is more than 10 meters. Reader antennas are generally directional antennas, and only the RF tags within the reader antenna directional beam range can be read/written. UHF tags are widely used in railway automated car identification, container identification, highway vehicle identification and automatic toll collection system due to its long reading range and fast data transmission rate.

The characteristics of HF electronic tags and UHF electronic tags:

HF tags are cheaper and more energy-saving than UHF tags. They can penetrate nonmetallic objects, and the working frequency is not restricted by radio frequency control. It is most suitable for objects with high water content, such as fruits.

UHF electronic tags have a wide range of functions and fast data transmission speed. However, they are relatively energy consuming and have weak penetration. There should not be too much interference in the operation area. UHF electronic tags are suitable for monitoring the goods transported from the seaport to the warehouse. Moreover, the price of UHF systems is relatively high, which is about 10 times of that of HF systems.