Simulation and experimental study of electromagnetic pulse simulator

In order to achieve the distribution of transient electromagnetic field in working region of bounded-wave EMP simulator, the model of bounded-wave EMP simulator is founded and numerical simulation of bounded-wave EMP simulator is carried out by using FDTD Method in this paper. The methods to deal with metal line bar, the exciter and load resistor of bounded-wave EMP simulator are discussed emphatically: metal line bar is substituted by ideal metal plane, the exciter is double-exponent voltage pulse source that is achieved by analyzing two-order discharging circuit and lumped resistor substitutes load resistor. Transient electromagnetic field is measured in working region of bounded-wave EMP simulator by using three-dimension transient electric field measurement system and transient magnetic field measurement system, the results of simulation and the measured results both indicate: self-constructed bounded-wave EMP simulator can bring EMP whose rise time is from 20ns to 30ns, the durative time is from 500 ns to 800 ns, the comparisons between simulated results and measured results demonstrate that numerical results agree with the experimental results. By the use of the model that the author founds, it is concluded that the distribution law of transient electromagnetic field in working region of bounded-wave EMP simulator: the amplitude of transient electromagnetic field decreases gradually from the center to two sides in working region of bounded-wave EMP simulator, with the height increasing , the amplitude of transient electromagnetic field increases. Accuracy of the results of electromagnetic interference and electromagnetic protection experiments can be checked based on founded model of bounded-wave EMP simulator.