In the studying, the incident angles of the electromagnetic waves were changed in order to discuss the efficiency of absorbing with different incident angles. Analyzing the influence of switching incidental angles on different kinds of metallic electromagnetic absorbers (Knitting, shuttling, and coating) with Double Ridged Waveguide Hom and Vector Network Analyzer to find out the best relationship between incidental angels and absorbers. In conclusion, the construction of the absorber, the type of metal in the absorber, and the amount of metal in the absorber affect on the absorbing quality. From the experiment, double layers of shuttling absorber mixed with 5% of stainless steal has a best result at 15 degree incident angle, and it can reduce 31.315dB of the electromagnetic waves.
