Electromagnetic Shielding Effectiveness Calculation for Cascaded Wire-Mesh Screens with Glass Substrate
关键词:
Electromagnetic shielding, transmission line theory, wire-mesh screens摘要
In this paper, a model is presented to calculate the electromagnetic shielding effectiveness of two cascaded wire-mesh sheets with glass substrate. The model is based on transmission line theory for calculating the equivalent sheet impedance of each wiremesh screen. The total shielding effectiveness for the sheets is obtained based on transmission matrix method. The wire-mesh screen is numerically simulated as a unit cell with periodic boundary conditions in order to verify the analytical results. It is shown that the shielding effectiveness is decreased by increasing the operating frequency. Also, it is shown that the total shielding effectiveness of the double wire-mesh layers is satisfactory high compared with single sheet shielding. The proposed structure is highly attractive for different shielding applications due to its lower cost, reduced weight and optical transparency compared to metallic sheets. The model results are compared with measurements. Good agreement between the analytical model and the measurements results is obtained.
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