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The principle of absorbing materials in RFID

Author:admin   AddTime:2021-05-12

The absorbing material is a composite material with excellent absorbing ability to electromagnetic waves. This kind of absorbing material is a composite material formed by physically thinning the alloy and treating it with a magnetic field to form a magnetic alloy with high magnetic permeability and dispersing it evenly in a polymer. The RFID system consists of an electronic tag or non-contact smart card (such as a smart phone with swiping function) placed on the identified object and a device that issues instructions to the electronic tag and collects feedback information from the electronic tag. This device is also called The RFID card reader or reader is composed of two parts. In order to allow other devices to display or use these data, it is generally possible to have an external RS232 protocol interface on the reader, so that information can be transferred with external devices.

After more than ten years of development in my country’s RFID industry, the technology is now relatively mature, especially in the past two years. Under the background that the country actively encourages and vigorously promotes the healthy development of the industry, as various factors continue to advance the Internet of Things, it has been maintaining The development trend is steadily rising. Because the absorbing material is a kind of magnetic functional material with high magnetic permeability, it is usually made by uniformly filling some absorbents on the polymer material and making it through a special process. Compared with the traditional absorbing materials, this kind of high-performance absorbing materials for 13.56MHz is different in performance characterization and usage principles. Traditional absorbing materials are mainly used in military countermeasures. Some aircrafts, battleships and armored tanks that cover and confuse the opponent's radar reconnaissance have microwave bands with high frequency, and the application analysis is also a far-field model.



The absorbing materials we mentioned today are mainly for the permeable magnets used to provide paths for the magnetic field in civil electronic equipment. They have high permeability and low magnetic loss at the frequency of use, and the loss will increase when the frequency is higher than the frequency of use. Large and other characteristics, with the nature of a low-pass filter. However, due to its advantages of flexibility and convenient installation, it has been favored by more and more R&D engineers.

Absorbing Material:https://www.goodsmaterial.com/

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