In the field of technology, a responder refers to an electronic module that can send and reply to messages. In recent years, due to the rapid development of radio frequency technology, responders have taken on a new meaning, also known as smart tags or labels. RFID electronic tag readers communicate wirelessly with RFID electronic tags through antennas, and can read and write tag identification codes and store data. RFID technology can simultaneously identify fast-moving objects and multiple tags, making operation fast and convenient.
The most important advantage of RFID systems is non-contact identification. It can read labels in harsh environments where snow, fog, ice, paint, dirt, and barcodes cannot be used, with extremely fast reading speeds of less than 100 milliseconds in most cases. The fast write capability of active RFID systems is also an important advantage. It can be used for interactive services such as process tracking and maintenance tracking.
The main problem restricting the development of RFID systems is the incompatibility of standards. The main manufacturers of RFID systems provide specialized systems, which result in different applications and industries adopting different manufacturer frequencies and protocol standards. This chaotic and fragmented situation has constrained the development of the entire RFID industry. Many European and American organizations are committed to solving this problem and have achieved some results. Standardization will stimulate the development and widespread application of RFID technology.

Radio frequency identification, RFID technology, also known as radio frequency identification, is a communication technology commonly known as electronic tags. Specific targets can be identified through radio signals, and relevant data can be read and written without establishing mechanical or optical contact between the identification system and the specific target.
Long service life and wide application range: Its wireless communication method enables it to be used in highly polluted and radioactive environments such as dust and oil pollution. Its enclosed packaging makes its service life much longer than printing barcodes;

Radio Frequency Identification (RFID) technology, also known as Radio Frequency Identification, is a communication technology commonly known as electronic tags. It can recognize specific purposes and read/write related data through wireless signals without the need to establish mechanical or optical contact between the recognition system and the specific purpose. In terms of transportation management, RFID technology is used, which only requires the installation of electronic tags on the outer packaging of goods and the installation of readers at transportation checkpoints or transfer stations to achieve visual management of assets. At the same time, shippers can access the in transit visualization webpage based on their permissions to understand the detailed location of goods, which is of great significance for improving the service level of logistics enterprises.

Radio Frequency Identification (RFID) is a wireless communication technology that identifies specific targets and reads and writes related data through radio signals, without the need for mechanical or optical contact between the identification system and the specific targets.
Anti pollution and durability. The carrier of traditional barcodes is paper, which is easily contaminated, while RFID has strong resistance to water, oil, and chemicals. In addition, due to the barcode being attached to plastic bags or outer packaging cartons, it is particularly prone to damage; RFID tags store data in chips, thus preventing contamination.

The essence of logistics management is to manage the entire logistics process to achieve two goals: reducing costs and improving service levels. How to ensure that the right customers receive the right products at the right time and place with the right capital and conditions has become the highest goal pursued by logistics enterprises. Generally speaking, the value of a company's inventory accounts for about 25% of its total assets and over 50% of its active assets. So the center of logistics management work is the management of inventory in the supply chain. 
In terms of transportation management, RFID technology is used, which only requires the installation of electronic tags on the outer packaging of goods and the installation of readers at transportation checkpoints or transfer stations to achieve visual management of assets. At the same time, shippers can access the in transit visualization webpage based on their permissions to understand the detailed location of goods, which is of great significance for improving the service level of logistics enterprises. 
The fast scanning RFID identifier can simultaneously identify and read multiple RFID tags! Small size and diversified appearance. RFID reading is not limited by size or appearance, and does not require matching the fixed size and printing quality of paper for reading accuracy. In addition, RFID tags can be miniaturized and diversified to be applied to different products. Anti pollution ability and durability. The carrier of traditional barcodes is paper, which is prone to contamination, but RFID has strong resistance to substances such as water, oil, and chemicals. In addition, since barcodes are attached to plastic bags or outer packaging cartons, they are particularly susceptible to breakage; RFID tags store data in chips, thus avoiding contamination. After the current barcode is printed, it cannot be changed, while RFID tags can repeatedly add, correct, and delete data stored in the RFID label, making it easier to update information. Penetrating and barrier free reading. Under cover, RFID can penetrate non-metallic or non transparent materials such as paper, wood, and plastic, and can stop penetrating communication. The barcode scanner must be in close proximity and unobstructed by objects to be able to read barcodes. The memory capacity of data is large. The capacity of one-dimensional barcodes is 50 bytes, the maximum capacity of two-dimensional barcodes can store 2 to 3000 characters, and the maximum capacity of RFID is several Megabytes. With the development of memory carriers, the data capacity also tends to expand from time to time. In the future, the amount of materials required to carry items will continue to increase, and the demand for expanding the capacity of labels will also correspondingly increase. Due to the fact that RFID carries electronic information, its data content can be maintained through passwords, making it less susceptible to forgery and alteration.

Passive tags do not have an internal power supply. Its internal integrated circuit is driven by the received electromagnetic waves emitted by the RFID reader. When the tag receives a signal of sufficient strength, it can send data to the reader/writer. These data not only include the ID number (globally unique ID), but also data that pre exists in the label EEPROM.
Passive tags have the advantages of low price, small size, and no need for power supply. The RFID tags on the market are mainly passive.