A team of researchers from the Korea Institute of Materials Science has developed a world-first ultra-thin film composite material capable of absorbing over 99% of electromagnetic waves from various frequency bands, including 5G/6G and WiFi. The material, which is less than 0.5mm thick, can absorb electromagnetic waves across multiple frequency bands simultaneously.
Electromagnetic waves emitted by electronic components can cause interference, leading to performance degradation in other devices. Conventional shielding materials reflect over 90% of the waves, with low actual absorbance rates. However, this new material absorbs and eliminates electromagnetic waves, resolving secondary interference issues.
The researchers achieved this breakthrough by synthesizing a magnetic material that selectively absorbs desired frequencies and incorporating conductive patterns on the film’s back side to control wave propagation. A carbon nanotube thin film was also applied to further enhance shielding capabilities.
Senior researcher Byeongjin Park led the project, stating that the material has the potential to significantly improve wireless communication device reliability, particularly in 5G/6G applications and autonomous vehicle radars. The technology has been patented domestically and is being transferred to material companies for use in actual devices and automobiles.
Source: https://techxplore.com/news/2024-10-ultra-thin-absorbs-electromagnetic-reliability.html