Correlation of Impedance and Shielding Effectiveness Measurements on Enclosure Level

摘要

This paper starts with an electrical analysis of a shielding enclosure and the description of serial and parallel oscillating circuits for specific parameter constellations. These parameters are the distance of the cover and bottom part and the number of connection points (screws). Based on adapted geometrical approaches, calculation of the electrical parameters is possible. At next, measurement procedures for the impedance and the shielding effectiveness are presented to prove the influence of the oscillating circuits. Also a simulation model with CST Microwave Studio was built for the determination of impedance and shielding effectiveness. Finally, the measurement and simulation results for different parameter constellations are compared and correlated.