What Is an Rfid Electronic Tag?

RFID electronic tags are widely used in everyone's daily life and production activities. It not only greatly improves production efficiency, but also brings a lot of convenience to people's daily life. So today I will introduce RFID electronic tags to you.

How RFID electronic tags work

RFID tags use wireless radio frequency to perform non-contact two-way data transmission between the reader and the radio frequency card to achieve the purpose of target identification and data exchange. First, after the RFID electronic tag enters the magnetic field, it receives the radio frequency signal sent by the reader, and then uses The energy obtained by the induced current sends out the product information stored in the chip (passive tag or passive tag), or the tag actively sends a signal of a certain frequency (active tag or active tag), and the reader reads the information and decodes it. Finally, it is sent to the central information system for relevant data processing.

The composition of RFID electronic tags

A complete RFID electronic tag consists of three parts: a reader/writer, an electronic tag, and a data management system. Its working principle is that the Reader emits radio wave energy of a specific frequency to drive the circuit to send out the internal data. At this time, the Reader sequentially Receive and interpret data and send it to the application for corresponding processing.

1. Reader

The reader is a device that reads the information in the RFID electronic tag or writes the information that the tag needs to store into the tag. Depending on the structure and technology used, the reader can be a read/write device and is the information control and processing center of the RFID system. When the RFID system is working, the reader sends radio frequency energy within an area to form an electromagnetic field. The size of the area depends on the transmission power. Tags within the reader coverage area are triggered, send the data stored in them, or modify the data stored in them according to the instructions of the reader, and can communicate with the computer network through the interface. The basic components of a reader usually include: transceiver antenna, frequency generator, phase-locked loop, modulation circuit, microprocessor, memory, demodulation circuit and peripheral interface.

(1) Transceiver antenna: Send radio frequency signals to tags, and receive response signals and tag information returned by the tags.

(2) Frequency generator: generates the operating frequency of the system.

(3) Phase-locked loop: generate the required carrier signal.

(4) Modulation circuit: Load the signal sent to the tag into the carrier wave and send it out by the radio frequency circuit.

(5) Microprocessor: generates a signal to be sent to the tag, decodes the signal returned by the tag, and sends the decoded data back to the application program. If the system is encrypted, it also needs to perform a decryption operation.

(6) Memory: stores user programs and data.

(7) Demodulation circuit: Demodulates the signal returned by the tag and sends it to the microprocessor for processing.

(8) Peripheral interface: communicates with the computer.

2. Electronic label

Electronic tags are composed of transceiver antennas, AC/DC circuits, demodulation circuits, logic control circuits, memory and modulation circuits.

(1) Transceiver antenna: Receive signals from the reader and send the required data back to the reader.

(2) AC/DC circuit: Utilizes the electromagnetic field energy emitted by the reader and outputs it through the voltage stabilizing circuit to provide stable power for other circuits.

(3) Demodulation circuit: remove the carrier from the received signal and demodulate the original signal.

(4) Logic control circuit: decodes the signal from the reader and sends back the signal according to the reader's requirements.

(5) Memory: system operation and storage of identification data.

(6) Modulation circuit: The data sent by the logic control circuit is loaded into the antenna and sent to the reader after being loaded into the modulation circuit.

Characteristics of RFID electronic tags

Generally speaking, radio frequency identification technology has the following characteristics:

1. Applicability

RFID tag technology relies on electromagnetic waves and does not require physical contact between the two parties. This allows it to establish connections and complete communications directly regardless of dust, fog, plastic, paper, wood and various obstacles.

2. Efficiency

The reading and writing speed of the RFID electronic tag system is extremely fast, and a typical RFID transmission process usually takes less than 100 milliseconds. High-frequency RFID readers can even identify and read the contents of multiple tags at the same time, greatly improving the efficiency of information transmission.

3. Uniqueness

Each RFID tag is unique. Through the one-to-one correspondence between RFID tags and products, the subsequent circulation dynamics of each product can be clearly tracked.

4. Simplicity

RFID tags have a simple structure, high recognition rate, and simple reading equipment. Especially as NFC technology becomes more and more popular on smartphones, every user's mobile phone will become the simplest RFID reader.

There is a lot of knowledge about RFID electronic tags. Joinet has focused on the research and development of various high technologies for many years, assisted the development of many companies, and is committed to bringing better RFID electronic tag solutions to customers.