New shield blocks electromagnetic interference while allowing wireless optical signals

Phys.org  January 25,2023 An international team of researchers (Sweden, China) experimentally demonstrated, for the first time, a mechanically flexible silver mesh that is visibly transparent, allows high-quality infrared wireless optical communication and efficiently shields electromagnetic interference in the X band portion of the microwave radio region. The Ag mesh/polyethylene (PE) achieved high average EMI shielding effectiveness (SE) of 28.8 dB in the X band with an overall transmittance of 80.9% at 550 nm. With a polydimethylsiloxane (PDMS) coating, the average EMI SE was still up to 26.2 dB and the overall transmittance was increased to 84.5% at 550 nm due […]

Electromagnetic radiation protection shields developed

Phys.org  September 7, 2018 Normally, heavy elements are used as the material for electromagnetic and magnetic shielding, as they efficiently absorb high-energy radiation. Bismuth is the best option in the ratio of the protection efficiency to mass-size parameters. An international team of researchers (Russia, Belarus) studied the dependency of the bismuth film microstructure and functional properties on the production process regimes and the initial electrolyte composition and determined that electrolyte mixing, temperature, and organic additives exert a noticeable influence on the electrode process of the discharge of Bi3+ions in acid perchlorate electrolyte. The research answers the question of how to […]