Differences in absorption effects of NFC anti metal absorbing materials on different metal materials and optimization strategies

Brief introduction

With the widespread application of NFC (Near Field Communication) technology in various fields, such as smartphone payments, access control systems, smart wearable devices, etc., the importance of NFC anti metal absorbing materials is becoming increasingly prominent. Advanced Institute (Shenzhen) Technology Co., Ltd. has in-depth research and development of related products in this field, and its research on platinum brand absorbing materials has attracted much attention. Different metal materials have different electromagnetic properties, which will affect the absorption effect of NFC anti metal absorbing materials. This article will exploreNFC anti metal absorbing materialDifferences in absorption effects on different metal materials and corresponding optimization strategies are proposed.

2、 Electromagnetic properties of different metal materials

1. Ferromagnetic metals (such as iron, nickel, etc.)
   • Ferromagnetic metals have high magnetic permeability and can strongly affect the distribution of magnetic fields. When NFC signals propagate in their vicinity, they are prone to generate significant eddy current effects, which can interfere with the transmission of NFC signals.
   • According to the principles of electromagnetism, the magnetic domain structure inside ferromagnetic metals will change under the action of external magnetic fields (such as those generated by NFC signals), resulting in magnetic field distortion and energy loss.
2. Non ferromagnetic metals (such as aluminum, copper, etc.)
   • Non ferromagnetic metals have higher electrical conductivity. For NFC signals, they also generate eddy current effects, but they are different from ferromagnetic metals. Non ferromagnetic metals mainly indirectly affect NFC signals through their influence on the electric field, as NFC signals are electromagnetically coupled and the electric and magnetic fields are interrelated.
   • Reference: In NFC communication, when a non ferromagnetic metal is located near the NFC antenna, according to Maxwell's equations, the changing magnetic field will induce an electric field in the metal, which will generate eddy currents and interfere with the normal transmission of NFC signals.

3、 The difference in absorption effect of NFC anti metal absorbing materials on different metal materials

1. Absorption effect on ferromagnetic metals
   • Advantage aspects
     • Advanced Institute (Shenzhen) Technology Co., LtdThe research platinum brand absorbing material can utilize its own magnetic properties to achieve good magnetic field coupling for ferromagnetic metals. Due to the high magnetic permeability of ferromagnetic metals, absorbing materials can compensate for the magnetic field distortion caused by ferromagnetic metals to some extent by adjusting their real and imaginary parts of magnetic permeability.
     • For example, when using research platinum brand absorbing materials on some iron equipment casings, it can reduce the interference of iron on NFC signal transmission to a certain extent, and improve the transmission distance and stability of NFC signals to a certain extent.
   • Disadvantage aspect
     • The strong magnetism of ferromagnetic metals may increase the likelihood of magnetic saturation in absorbing materials. Once the absorbing material reaches magnetic saturation, its absorbing effect will sharply decrease.
     • Reference: This is because when the absorbing material is magnetically saturated, its internal magnetic domains can no longer effectively adjust and absorb the external magnetic field, thereby affecting the protection of NFC signals.
2. Absorption effect on non ferromagnetic metals
   • Advantage aspects
     • Research Platinum brand absorbing materialsFor non ferromagnetic metals, they mainly deal with eddy current interference caused by electric field induction. Absorbing materials can reduce the electric field strength on non ferromagnetic metal surfaces by absorbing and dissipating electromagnetic wave energy, thereby reducing interference with NFC signals.
     • On the aluminum casing of smart devices, the research platinum brand absorbing material can effectively reduce the shielding effect of aluminum on NFC signals and improve the recognition sensitivity of NFC modules.
   • Disadvantage aspect
     • The high conductivity of non ferromagnetic metals results in relatively dispersed eddy currents, and absorbing materials may require larger coverage areas or higher absorption performance to completely eliminate interference.
     • Reference: This is because the eddy currents generated in non ferromagnetic metals have a wide distribution range, and absorbing materials need to cover sufficient areas to effectively absorb the interference electromagnetic waves generated by eddy currents.

4、 Optimization strategy

1. Material formula optimization
   • For the problem of magnetic saturation that is prone to occur on ferromagnetic metals, Advanced Institute (Shenzhen) Technology Co., Ltd. can reduce the possibility of magnetic saturation under high magnetic fields by adjusting the formula of the research platinum brand absorbing material. For example, adding some special magnetic elements or changing the particle size distribution of magnetic particles can improve the linear range of magnetic permeability of the material.
   • Reference: Relevant studies have shown that by adjusting the formula of magnetic materials reasonably, their performance in strong magnetic field environments can be effectively improved.
2. Structural design optimization
   • When dealing with interference from non ferromagnetic metals, multi-layer structures can be designedAbsorberFor example, the outer layer uses materials with high conductivity to quickly guide eddy currents, while the inner layer uses materials with high absorption properties to absorb electromagnetic wave energy.
   • Reference: Multilayer structured absorbing materials have better performance in electromagnetic shielding and absorption, which has been studied in the field of electromagnetic compatibility.
3. Customized design
   • Provide customized solutions for absorbing materials based on the specific application scenarios of different metal materials. For example, for NFC applications inside car bodies dominated by ferromagnetic metals, a specially designed absorbing material suitable for automotive environmental temperature, mechanical vibration, and other conditions can be used.
   • In practical industrial applications, customized design can better meet specific needs and improve product performance and reliability.

5、 Conclusion

NFC anti metal absorbing materialThe absorption effect varies on different metal materials, which is closely related to the electromagnetic properties of different metals. The research platinum brand absorbing materials of Advanced Institute (Shenzhen) Technology Co., Ltd. have both advantages and areas for improvement in different metal materials. Through strategies such as material formula optimization, structural design optimization, and customized design, the absorption effect of NFC anti metal absorbing materials on different metal materials can be improved, thereby further promoting the widespread application of NFC technology in various metal environments.

The above data is for reference only, and specific performance may vary due to production processes and product specifications.