Electromagnetic compatibility predesign for satellite secondary electrical power supply

This paper presents an electromagnetic compatibility predesign method to deal with the radiation emission of a satellite's secondary electrical power supply. The method analyzes the causes of electromagnetic interference. By using a SPICE simulator, this paper establishes an equivalent circuit model of conducted interference, with which circuit parameters are optimized and conducted interference sources are simulated. Radiated interference is approximately computed with an amendatory mongline model. According to the approximate computation, the number and position of the equivalent dipoles are optimized by genetic algorithm for the equivalent field model. Basing on the field-circuit combination method, the conducted interference results obtained from simulation become the excitation source of the equivalent field model for the calculation of radiated interference. In order to achieve predesign optimization for the circuit and the printed circuit board, measures are proposed according to the simulation results. Simulation results and experimental data show good agreement. The radiated emission standard test is passed successfully with the application of this method.