Development of an improved coaxial cell for measuring the shielding effectiveness of materials

Abstract

Abstract The article presents the results of the development of a coaxial cell for measuring shielding effectiveness of composite materials. The basis for the design of the cell was a model of a coaxial transmission line with air filling, which was obtained using full wave analysis and parametric optimization and is characterized by a maximum reflection coefficient |S11| less than -20 dB in the frequency range up to 10 GHz. Based on the results of modeling and optimization, an improved design of the cell for SE measuring is presented, which differs from standardized cells in a simplified assembly with the material located inside and providing measurements also in the low-frequency region.