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Absorbing principle and application of absorbing materials in RFID equipment

Author:admin   AddTime:2020-07-23

Microwave absorbing materials, mainly for the magnets used to provide paths for the magnetic field in civil electronic equipment, have the characteristics of high permeability and low magnetic loss at the frequency of use, while the loss will increase when the frequency is higher than the use frequency, which has the property of low-pass filter. However, due to its advantages of flexibility and easy installation, it has been favored by more and more R & D engineers. Microwave absorbing material is a kind of magnetic functional material with high permeability. It is usually made by filling some absorbent evenly on polymer material by special technology. Compared with the traditional absorbing materials, this kind of high-performance absorbing materials for 13.56MHz are different in performance characterization and application principle.

Application in RFID equipment:

1. Application of RFID antenna to metal isolation

This application mainly utilizes the high track rate characteristics of a kind of high magnetic track rate and low loss type absorbing materials; when used, the absorbing plate is inserted between the 13.56 MHz circular antenna and the metal substrate, Increase the induced magnetic field through the absorbing material itself, reduce the probability of passing through the metal plate,   so as to reduce the induced eddy current in the metal plate, thus reducing the loss of the induced magnetic field,   at the same time, due to the insertion of the absorbing plate, the measured parasitic capacitance will also be reduced, and the frequency offset will be reduced, which is consistent with the resonance frequency of the card reader, so as to improve the card reading distance It depends on the excellent performance of absorbing material

2. Safety protection

Due to the application of high-power radar, communication equipment, microwave heating and other equipment, it is a new and complex subject to prevent electromagnetic radiation or leakage and protect the health of operators. Absorption materials can achieve this purpose. In addition, the problem of electromagnetic radiation is widespread in today's household appliances, which can be effectively suppressed by reasonable use of absorbing materials and their components.

Absorbing material: www.goodsmaterial.com




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