In the rapid development of the Internet of Things, NFC (Near Field Communication) technology is widely used in fields such as mobile payments and intelligent access control. However, metal environments can seriously interfere with NFC signals, making NFC anti metal absorbing materials the key to solving this problem. Advanced Institute (Shenzhen) Technology Co., Ltd. has been focusing on the research and development of electromagnetic materials, and is making improvements
NFC anti metal absorbing materialMany achievements have been made in the electromagnetic loss mechanism.
1、 Existing electromagnetic loss mechanism
NFC anti metal absorbing materials mainly consume electromagnetic wave energy through dielectric and magnetic losses. Dielectric loss originates from the polarization process inside the material. When electromagnetic waves act on materials, polar molecules in the material will rapidly rotate in the direction of the electric field, generating heat through intermolecular friction and converting electromagnetic energy into thermal energy. Magnetic losses are caused by the hysteresis, eddy currents, and other effects of materials. Under an alternating magnetic field, the magnetic domain walls of magnetic materials undergo displacement and rotation, overcoming internal frictional resistance to do work and generating hysteresis losses; At the same time, the changing magnetic field will induce eddy currents inside the material, which will generate Joule heat through the material's resistance and form eddy current losses.
2、 Improvement direction
（1） Optimize the microstructure of materials
Advanced Institute (Shenzhen) Technology Co., Ltd. has found that regulating the microstructure of materials can significantly improve electromagnetic loss performance. For example, preparing absorbing materials with porous structures increases the propagation path of electromagnetic waves inside the material, causing multiple reflections and scattering, prolonging the interaction time with the material, and thus improving energy loss. The company utilizes advanced nano preparation technology to precisely control the pore size and porosity, and prepares porous NFC anti metal absorbing materials with pore sizes ranging from tens to hundreds of nanometers, effectively enhancing dielectric loss.
（2） Composite multi-component materials
The electromagnetic loss performance of a single material is often limited.
Advanced Institute (Shenzhen) Technology Co., LtdComposite materials with different electromagnetic properties to construct a synergistic loss mechanism. For example, combining ceramic materials with high dielectric constants with magnetic metal materials. Ceramic materials provide strong dielectric loss, while magnetic metal materials contribute to magnetic loss. The combination of the two broadens the electromagnetic loss frequency band of the material and enhances its overall loss capability. Research has shown that under specific ratios, the electromagnetic loss performance of the composite material in the NFC operating frequency band (13.56MHz) is improved by more than 30% compared to a single material.
（3） Introducing a new loss mechanism
In addition to traditional dielectric and magnetic losses, Advanced Institute (Shenzhen) Technology Co., Ltd. is exploring the introduction of other loss mechanisms. For example, utilizing the quantum tunneling effect of materials. At the nanoscale, electrons may cross energy barriers higher than their own energy, which consumes energy. By constructing suitable nanostructures in materials, quantum tunneling effect can be induced, opening up new avenues for electromagnetic wave energy loss. Experimental results have shown that the introduction of quantum tunneling effect significantly improves the electromagnetic losses of materials in the low frequency range, which is more in line with the application requirements of NFC technology in complex electromagnetic environments.
3、 Product advantages of Advanced Institute (Shenzhen) Technology Co., Ltd
Based on the above improvement achievements, Advanced Institute (Shenzhen) Technology Co., Ltd. has launched
NFC anti metal absorbing materialHas significant advantages in the market. Its product has excellent electromagnetic loss performance, which can effectively weaken the interference of metals on NFC signals and ensure communication stability. At the same time, the material has good flexibility and processing performance, and can be made into various shapes of absorbing plates, absorbing films, etc. according to different application scenarios, meeting diverse usage needs.
Advanced Institute (Shenzhen) Technology Co., Ltd. has conducted in-depth research and improvement on the electromagnetic loss mechanism of NFC anti metal absorbing materials, providing strong support for the reliable application of NFC technology in complex environments, promoting the development of related industries, and providing new ideas for the research and innovation of future electromagnetic materials.
The above data is for reference only, and specific performance may vary due to production processes and product specifications.
