38M2020AA1212

RF/EMI shielding and absorbing materials are technologies designed to reduce radio frequency and electromagnetic interference (RFI/EMI). In this article, the 38M2020AA1212 application field and working principle will be discussed.

Overview

The 38M2020AA1212 is a ferrite absorber designed for short-range communications. It is a flexible absorber composed of ferrite filled with additional material, such as aluminum, rubber, or copper. The absorption attenuation performance of 38M2020AA1212 is expressed as a better shielding effect than full metal shields due to its flattened profile.

Application Field

The 38M2020AA1212 absorbers are most commonly used in communication systems for data and voice applications. It has advantages in applications such as radio and TV transmission, high voltage power supplies, industrial and military applications. Also, it is widely used in mobile phone networks, wireless communication systems, EMC laboratories, and telecommunications.

Working Principle

The 38M2020AA1212 absorber acts as an "energy sponge" for the unwanted signal. When an interfering electromagnetic wave encounters a ferrite absorber, the ferrite material absorbs the energy as a static charge. The absorber acts as an RF sponge and reduces the interference strength to a safe level. The absorber surface has lines that serve as the "weak links" for energy transfer. The lines act like antennas, and when the wave hits them, it is absorbed by the ferrite material.

The absorber is treated or "tuned" to its specific application. This is done by adjusting the size and shape of the absorber. The key to proper tuning of the absorber is to ensure that it is optimized for the frequencies and the required attenuation.

Conclusion

The 38M2020AA1212 absorber has the advantage that it can be adjusted to fit the requirement and it provides a cost-effective solution for applications such as radio and TV transmission, high voltage power supplies, mobile phone networks, and wireless communication systems. Its shielding effect is better than full metal shields due to its flattened profile.