전달행렬법 및 복소 산란 계수를 이용한 평판형/다중층 소재의 전자기파 차폐 특성에 대한 주파수 의존성 연구

초록

In the field of the electromagnetic interference shielding, tremendous research reports mainly have focused on the development of an advanced shielding architecture by modifying its structure and/or optimizing physical properties. It is well-known that shielding materials exhibit frequency-dependent physical properties (i.e., electrical conductivity, permittivity, and permeability, etc.). Therefore, shielding characteristics analysis should reflect this variability. In this study, we present the frequency-dependent shielding characteristics of layered structures based on a π-conjugated conducting polymer. The theoretical and experimental evaluation shows that the shielding efficiency of the multi-layered structure reached up to 29.6 dB and ∼28 dB, respectively, which are also confirmed by complex scattering parameter measurement. In addition, our analysis based on transfer matrix method clearly shows frequency-dependent shielding characteristics.

키워드