What are the principles and advantages of RFID reader?

How rfid reader works?

Radio Frequency Identification (RFID) is a non-contact automatic identification technology. Its basic principle is to use the transmission characteristics of radio frequency signals and spatial coupling (inductive or electromagnetic coupling) or radar reflection to achieve the opposite. Identify automatic recognition of objects.

The RFID reader can communicate with the RFID tag through the antenna through wireless communication. It can read or write the tag identification and memory data. The typical RFID reader consists of RFID RF module (transmitter and receiver), control unit and reader antenna.

In RFID systems, electronic tags are also called RFID tags, transponders, and data carriers; read and write devices are also known as readout devices, scanners, communicators, and readers (depending on whether electronic tags can rewrite data if they are wirelessly rewritten). Between the electronic tag and the reader, the space (no contact) coupling of the radio frequency signal is realized through the coupling element, and the transfer of the transmission and data is realized in the coupling channel according to the time sequence relationship.

The RFID reader can communicate with the RFID tag through the antenna through wireless communication. It can read or write the tag identification and memory data. The typical reader consists of a high frequency module (transmitter and receiver), a control unit and a reader antenna.

There are two types of coupling of RF signals that occur between the reader and the electronic tag.

(1) Inductively coupled. The transformer model is coupled by the high frequency alternating magnetic field in the space, based on the law of electromagnetic induction.

(2) Electromagnetic backscatter coupling: The radar principle model, the emitted electromagnetic wave, reflected after hitting the target, and carrying back the target information, is based on the spatial propagation law of the electromagnetic wave.

8 advantages of rfid reader

First, we need to pay attention to the frequency range of the reader device and see if it meets the frequency specification of the project site.

Second, understand the maximum transmitting power of the reader and the radiation of the matching type antenna.

Third, look at the number of antenna ports that the reader has, depending on whether the application requires multiple interfaces.

Fourth, whether the communication interface meets the needs of the project;

Fifth, the interpretation distance and anti-collision indicators, the reading distance indicator should be clear what antenna and label test; anti-collision should be clear what label in what arrangement, how long after reading all;

Sixth, an RFID application system is related to the reader, but also related to the label, the antenna, the material of the labelled item, the moving speed of the labelled item, the surrounding environment, etc., and it is better to simulate the scene before determining the equipment. Testing and verification to ensure that the product really meets the application needs;

Seventh, the stability of the continuous test equipment under the simulation condition ensures stable operation for a long time.

Eighth, look at whether the development materials meet the system development needs, it is best to support the system you use, preferably with related routines, if not supported, the development time will be very long, and even the development will not continue.

The above is the working principle of rfid reader and its eight advantages. I hope that everyone can better apply it to real life after understanding, and hope that the prospect of rfid reader is getting better and better, if you have any question, please send to us at:

info@rfid-global.com.cn, thanks!