Ex) Article Title, Author, Keywords
New Phys.: Sae Mulli 2021; 71: 464-468
Published online May 31, 2021 https://doi.org/10.3938/NPSM.71.464
Copyright © New Physics: Sae Mulli.
Wongyu JANG, Baekil NAM, Minji GU, Shanigaram MALLESH, Ki Hyeon KIM*
Department of Physics, Yeungnam University, Gyeongsan 38541, Korea
We have designed a jig that employed the flanged, coaxial transmission line through a 3D finite-element-method (FEM) simulation to measure the broadband electromagnetic (EM) shielding effectiveness (SE) in the frequency range from 0.5 GHz to 18 GHz. The flanged, coaxial transmission line comprises the ground (outer diameter: 7.00 mm) and the signal line (inner diameter: 3.04 mm). Representative specimens were prepared with metallic materials (Al, Ni, Cu sheets, \& Ni mesh) and non-metallic materials (graphene oxide and magnetic polymer composite) to evaluate the SE. We analyzed the EM properties, the reflection, absorption, and total EM SE, of the fabricated specimens. Further, the SE results acquired from the flanged, coaxial transmission line which compared with those of a rectangular waveguide by measuring the S parameters. The SE measured using the flanged, coaxial transmission line correlates well with those of the rectangular waveguides (WR-90, WR-62).
Keywords: Shielding effect, Flanged coaxial transmission line, Rectangular waveguide, Broadband, ASTM D4935