What is the storage structure and principle of UHF tags?

With the development of modernization, UHF technology is increasingly widely used in all walks of life. UHF RFID electronic tags are like "smart ID cards" for items, giving them unique identification. What are the specific storage methods and actual application effects of such tags?

Compared with low-frequency and high-frequency RFID technologies, UHF RFID technology has obvious advantages. Its reading range is wide, exceeding 10 meters; its reading speed is extremely fast, and it can process hundreds of tags at a time; at the same time, its data storage capacity is also very strong. In the retail industry, it can efficiently complete inventory counting; and in asset management, it can also improve the efficiency of asset tracking. These characteristics make UHF RFID have broad application potential in many fields. It shows strong application value in many aspects. Such advantages make UHF RFID show great application prospects in many fields.

The UHF RFID system consists of three parts: reader, antenna and electronic tag. Among them, the electronic tag is the carrier of data, and its storage capacity and data manageability directly determine the application value of the entire system.

The data storage structure of UHF RFID tags is as follows

1. Physical storage composition of tags: The storage unit of UHF RFID tags usually consists of an integrated circuit chip and an antenna.
The chip contains:

① analog front end: responsible for receiving and sending radio frequency signals

② digital control unit: processing instructions and logic control

③ memory: used to store data, usually divided into multiple storage areas

2. Standardized storage partitions: Tag memory is usually divided into four main areas,

① Reserved memory: 32 bits, storing the access password and deactivation password of the tag

② EPC memory: variable length (usually 96-496 bits), storing electronic product codes

③ TID memory: 64 bits or more, storing the unique identifier of the tag, written by the chip manufacturer

④ User memory: variable capacity (from 0 to thousands of bits), for free use by users

Each part has its specific function, and they work together to form the data storage system of the electronic tag. This scientific partition design ensures that the electronic tag can store and manage various data in an orderly manner, providing a solid guarantee for the stable operation of the system.

3. Storage capacity range: The storage capacity of different models of UHF RFID tags varies greatly.
① Low-end tags: 96-128-bit EPC storage, no user memory
② Mid-end tags: 96-496-bit EPC storage, 32-512-bit user memory
③ High-end tags: 496-bit or more EPC storage, 512-bit to 8K-bit user memory

When storing information, UHF RFID electronic tags seem to have a "wireless conversation" with the reader. When the reader writes data, it will send out a radio frequency signal through the antenna, which is like a "call". The antenna of the electronic tag captures this signal and converts it into electrical energy to power the chip. The chip then encodes the signal, embeds the data into the reflected wave, and stores it in the designated area. This process is both efficient and intelligent, and can ensure the accurate storage of data.

The words, numbers and pictures in daily life are converted into binary codes composed of 0 and 1 in the electronic tag. These codes, like letter combinations, save information through different permutations and combinations of 0 and 1. This method is both unified and efficient, ensuring that data can be accurately transmitted and processed between the tag and the read-write system.

The data of the UHF RFID electronic tag can be repeatedly erased like a notebook, however, the number of such erasures is not infinite, usually tens of thousands to hundreds of thousands of times. In industries such as clothing warehousing, general tags are sufficient to meet the use needs. To clear data, when erasing and writing data on the UHF RFID electronic tag, the corresponding reader-writer device is usually required and certain operating specifications must be followed. At the same time, in order to ensure the security and accuracy of the data, some tags also set access rights and encryption mechanisms.

Handheld-wireless  provides a variety of RFID readers and writers and supports customized services, which can be widely used in ultra-high frequency,low frequency, high frequency electronic tag reading and writing in various industries to improve the efficiency of enterprise inventory turnover and asset inventory.