Equivalent Analysis of Equipment Sensitivity Thresholds Under Plane Wave Irradiation Conditions in Reverberation Chamber

Reverberation chamber (RC) is a new testing environment in the field of electromagnetic compatibility measurement. Compared with the traditional testing environments, the RC has obvious advantages in improving testing efficiency and generating high E-field strength with relatively low input power. However, there are inconsistent problems in the test results of the radiation sensitivity threshold of the equipment in the reverberation chamber and the uniform field environment obtained by using the test methods in the current standards. Therefore, studying the equivalence of radiation sensitivity thresholds between the two has become a hot issue at present. Since most frequency-using devices in the electromagnetic environment can be equivalent to an antenna, in this paper, the dipole antenna under the compound field of the boundary deformation reverberation chamber and the uniform field of the anechoic chamber (AC) is taken as the research object to study the equivalence of antenna coupling power under these two conditions. Firstly, the coupling models in the anechoic chamber and reverberation chamber environments were established. The formulas for the antenna coupling power and the spatial radiation field strength under different radiation conditions were derived, and the power correlation coefficients of the two under the same sensitivity threshold were obtained. Subsequently, the electromagnetic environment of the reverberation chamber was constructed by using the Monte Carlo method, and the influence law of random plane waves with different column numbers on the coupling power of the antenna was simulated and analyzed. Finally, the equivalence factor of the coupling power of the two when the threshold of the radiation sensitivity test is the same in the reverberation chamber and the anechoic chamber is obtained.