What three parts does the RFID system consist of?

The RFID system consists of three parts: tag, reader, and antenna. They are: 1. The tag is composed of coupling components and chips. Each electronic tag has a unique electronic code; 2. The reader is the reader. Or a device for writing tag information, which can be designed to work in various modes such as handheld or fixed; 3. The antenna is used to transmit radio frequency signals between the tag and the reader.

The operating environment of this article: Windows 7 system, Dell G3 computer.

1. RFID technology definition

RFID technology, also known as electronic tags, is a short-range wireless communication technology that can identify specific targets and read and write through radio signals. Relevant data without establishing mechanical or optical contact between the identification system and the specific target, so it is a non-contact automatic identification technology.

2. Three parts of the RFID system

The RFID system mainly consists of three parts: tag, reader and antenna. Generally, the data information collected by the reader is sent to the background system for processing.

(1) Tag: Tag is composed of coupling components and chips. Each electronic tag has a unique electronic code and is attached to the object to identify the target object; each tag has a The world's only ID number, UID (User Identity Certificate), is stored in ROM when making tag chips and cannot be modified. It has a very important impact on the development of the Internet of Things.

(2) Reader: A reader is a device that reads or writes tag information and can be designed in various working modes such as handheld or fixed. To identify, read and write tags, the collected data information will generally be transmitted to the backend system, which will process the data information.

(3) Antenna: The antenna is used to transmit radio frequency signals between the tag and the reader. The antenna in the radio frequency circuit is the bridge between the reader and the electronic tag. The radio frequency signal energy sent by the reader is radiated to the space in the form of electromagnetic waves through the antenna. When the antenna of the electronic tag enters the space, it receives the electromagnetic wave energy, but can only Receive a very small part of it.

There are two antenna coupling methods between the reader and the electronic tag: one is the inductive coupling method, which is suitable for low-frequency radio frequency identification systems; the other is the backscattering coupling mode, which is suitable for ultra-high frequency identification systems. Radio frequency identification system applications in frequency bands. The antenna can be regarded as the air interface between the reader and the electronic tag and is a very important component of the RFID system.

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