Modeling of semi-anechoic chamber for use in automotive EMC simulations

In this paper, a procedure for modeling the semi-anechoic chambers is given. The hybrid absorbers are replaced with surface impedance sheets. Using the measured reflectivity data, one can determine the surface impedance of the terminating sheet. The proposed method is validated using measurements for a 1m long wire in the Biconical antenna range. In addition, chamber model is also validated for monopole antenna.