Visualization of Noise Coupling Paths Based on the Reciprocity Theorem

In this article, visualization of noise coupling paths is proposed and verified. The coupling coefficient (
CC
) is derived based on the Reciprocity theorem and time-average coupled power, which represents the contribution of each spatial point to the coupled power. The physical meaning of
CC
is demonstrated by relating the integrations of
CC
in a volume space occupied by absorbers to the coupled power being suppressed by the absorbers. The proposed method is applied to a practical device and the identified dominant coupling paths are experimentally verified.