No more helplessness! The ultimate solution to the metal interference problem in 13.56MHz high-frequency RFID starts with this absorbing material

RFID technology has played an important role in modern logistics management and supply chain. However, RFID metal interference is a problem that needs to be addressed. Especially at a high frequency of 13.56MHz, metal objects cause interference to the communication between RFID readers and electronic tags. In order to solve this problem, Advanced Institute Technology has developed absorbing materials to solve the problem.

The wavelength corresponding to the RFID frequency of 13.56MHz is 22.1m, which is much greater than the distance between the reader antenna and the electronic tag. Therefore, when dealing with preventing metal interference, we can simplify the electromagnetic field between the distance from the reader/writer to the antenna as an alternating magnetic field.

In order to achieve the best communication effect, a resonant circuit can be formed by adjusting the antenna coil and capacitor of the electronic tag, and tuning it to the transmission frequency specified by the reader/writer of 13.56MHz. The tuned circuit in this way will cause the voltage generated by the coil inductance in the tag to reach its maximum value.

At the same time, the reading distance of RFID tags is directly proportional to factors such as the number of turns of the coil in the tag, the area enclosed by the coil, and the distance and relative angle between the reader/writer and the tag. RFID electronic tags used at 13.56MHz typically have a maximum read/write distance of around 10 centimeters and a current consumption of 1 milliampere. As the frequency increases, the number of coil turns required for electronic tags decreases, typically ranging from 3 to 10 turns at this frequency.

However, the reading distance of RFID tags is not only related to the characteristics of the tag itself, but also influenced by its environment. When using inductively coupled radio frequency identification systems, it is sometimes required to directly install the antenna of the reader or electronic tag on a metal surface. However, due to the magnetic flux generated by the metal surface on the antenna, it can induce eddy currents. According to Lenz's law, eddy currents will have a reverse effect on the magnetic field of the antenna, causing the magnetic field on the metal surface to rapidly weaken. This will seriously affect the data reading distance between the reader and the electronic tag, and may even lead to misreading or reading failure.

Therefore, measures need to be taken to address the issue of metal surface interference. Absorbing materials play an important role in reducing interference by absorbing and attenuating electromagnetic waves on metal surfaces. By using absorbing materials, electromagnetic waves reflected and scattered on metal surfaces can be effectively reduced, thereby enhancing the signal transmission quality between readers and electronic tags.

In summary, RFID metal interference is a problem that needs to be addressed. By adjusting the antenna coil and capacitor of the electronic tag to form a resonant circuit, and using absorbing materials to reduce metal surface interference, the stability and reliability of the RFID system can be improved. This will provide strong support for logistics management and efficient operation of the supply chain.