Electromagnetic interference shielding efficiency and noise suppression in a transmission line for carbon-coated magnetic composite films
- Authors
- 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.
- Issue Date
- 9월-2008
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- magnetic composite film; electromagnetic interference shielding efficiency; noise suppression; power loss; microstrip line
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.53, no.3, pp.1434 - 1437
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 53
- Number
- 3
- Start Page
- 1434
- End Page
- 1437
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/122770
- DOI
- 10.3938/jkps.53.1434
- ISSN
- 0374-4884
- Abstract
- 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.
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Collections - College of Science > Department of Physics > 1. Journal Articles
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