What is the Principle of High Power RFID Reader

RFID technology has been applied in many industries due to its characteristics of non-contact identification, long-distance identification, and strong environmental adaptability. According to different reading distances, RFID devices are often divided into high power RFID readers, medium-range and short-range readers in the industry. This article takes a high power RFID reader as an example to introduce the working principle of a high power RFID reader in detail. The reading and writing distance of common high power RFID reader is usually between 1-20 meters. There are many readers that meet this condition. According to the working frequency, they can be divided into high power RFID readers and UHF high power RFID readers.

Working Principle of high power RFID reader

High power RFID readers usually consist of antennas, radio frequency modules, control modules and interface modules. They mainly use radio frequency signals and spatial coupling transmission characteristics to achieve energy transfer and data exchange between electronic tags and readers. Radio frequency signals are used to transfer energy to the electronic tag, causing the electronic tag to be activated and transmit the data stored in it to the reader. The reader operates through the radio frequency module (transmitter and receiver) and the read-write control module. The frequency band of high-frequency readers and writers is 13.56Mhz, and the reading distance is usually within 1m, while high power RFID readers increase the power of the readers and writers. The greater the transmitting power will radiate more energy, and naturally It can bring a longer card reading distance; or using a larger gain card reader antenna can effectively improve the reading performance and obtain a longer reading distance.

Working principle of UHF high power RFID reader

The operating frequency of UHF readers and writers is generally between 860MHz and 960MHz, and has the advantages of long-distance reading and group reading. It mainly uses the principle of electromagnetic reflection, that is, the reader transmits energy and exchanges data with the tag through electromagnetic waves. The UHF RFID reader is mainly responsible for communication with tags. The reader emits radio frequency signals, activates nearby tags, and receives data returned by the tags. The reader's antenna achieves wireless communication with the tag by sending and receiving radio frequency signals. Readers and writers can interact with other devices (such as computers) through interfaces to read and write tag data.
 

The communication process of UHF RFID can be divided into two modes: active mode and passive mode. In active mode, the reader sends radio frequency signals regularly, and the tag is activated and returns data. This mode is suitable for real-time tracking and monitoring of tags. In passive mode, the reader is generally in standby mode. The reader is activated by issuing work instructions to transmit radio frequency signals. The tag is activated and returns data after receiving the signal from the reader antenna. This mode is suitable for tags. Periodic data collection and management. Compared with high-frequency high power RFID readers, UHF high power RFID readers have a longer reading distance, generally reaching more than 10m, and have a higher data transmission rate. Andi Electronics URD5218 UHF high power RFID reader has high-sensitivity reading and writing performance and adopts fast anti-collision processing algorithm. It can be widely used in libraries, file management, production process automation, laundry automation management, drug tracking and other fields.

Practical Application of high power RFID reader

High power RFID readers can be used in many fields such as intelligent manufacturing, logistics and warehousing, and asset management. In intelligent manufacturing, high power RFID readers can be used to implement material tracking, equipment status monitoring, etc. in the production process to improve production. Efficiency and product quality; in logistics management, high power RFID readers can be used to realize real-time tracking of goods, inventory management and distribution services, improving logistics efficiency and customer satisfaction.