Time-Domain Response Simulation of Incident Field Coupling to Transmission Lines

摘要

This paper presents an analysis of time-domain electromagnetic (EM) field coupling to transmission lines. The time-domain 3D EM simulation of the field-to-line coupling system is performed using the uniform plane wave excitation defined by the broadband Gaussian pulse. An analytic background is given to justify usage of the simulated time-domain response as an impulse response of the field-to-line coupling system. The simulated impulse response relates the induced voltages at the transmission line terminals to the EM plane wave excitation. By knowing the impulse response it is possible to predict induced terminal voltages for arbitrarily defined time-domain EM fields. This approach is validated by measurements of the EM field coupling in a transverse electromagnetic mode (TEM) cell and on a printed circuit board (PCB) transmission lines. Very good agreement is obtained between the measured results and results obtained by the convolution for various orientations of the transmission lines and various load impedances.