Lee, J. W. Lee, C. Y. Hong, Y. K. Kim, S. H. Joo, J. Kim, S. W. Kim, Y. B. Kim, K. Y. Yun, Y. C. Lee, K. S. 2024-01-20T22:35:52Z 2024-01-20T22:35:52Z 2021-09-03 2008-09 0374-4884 https://pubs.kist.re.kr/handle/201004/133194 We report on the electromagnetic interference (EMI) shielding in the far-field and the near-field regions and on the noise suppression characteristics for carbon-coated Fe-Si-Al/polymer composite films in the frequency range from 20 MHz to 5 GHz. The carbon-coated Fe-Si-Al/polymer composite films were placed in a single microstrip line (MSL) and the reflection and transmission coefficients were measured to determine the noise suppression characteristics (i.e., power loss). The near-field EMI shielding efficiencies (SEs) were measured using the double MSLs method. The frequency dependence of the near-field EMI SE was similar to that of the dielectric constant and the permeability of the composite films. The far-field EMI SEs were measured for the composite films with various surface resistances. The EMI SE in the far-field region and the noise suppression of the composite films increased with decreasing surface resistance of the composite films. The measured EMI SEs and their frequency dependences in the far-field and the near-field regions qualitatively agree with the theoretical results obtained from the computer simulations. English KOREAN PHYSICAL SOC THIN-FILMS PERMEABILITY RESONANCE RF Electromagnetic interference shielding efficiency and noise suppression in a transmission line for carbon-coated magnetic composite films Article 10.3938/jkps.53.1434 1 JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.53, no.3, pp.1434 - 1437 JOURNAL OF THE KOREAN PHYSICAL SOCIETY 53 3 1434 1437 scie scopus kci 000259194800027 2-s2.0-53549131516 Physics, Multidisciplinary Physics Article; Proceedings Paper THIN-FILMS PERMEABILITY RESONANCE RF magnetic composite film electromagnetic interference shielding efficiency noise suppression power loss microstrip line