NOISE IMMUNITY EVALUATION APPARATUS, METHOD OF EVALUATING NOISE IMMUNITY, AND NON-TRANSITORY COMPUTER READABLE MEDIUM

摘要

A noise immunity evaluation apparatus measures S parameters of a device including a pair of input signal ports, a pair of output signal ports, and a noise signal port for input of a noise signal; calculates, as an evaluation index, a difference between S parameters between the noise signal port and the pair of input signal ports or between the noise signal port and the pair of output signal ports; acquires a first frequency spectrum obtained by performing a fast Fourier transform on a voltage waveform obtained by performing an electromagnetic field analysis on the noise signal, and calculates a second frequency spectrum as a product of the first frequency spectrum and the evaluation index; and extracts a frequency with a local maximum voltage value in the second frequency spectrum as a frequency for evaluation of noise immunity.