EMI noise source discrimination using cross domain analyzer and analog RoF link with mobile robot
In this paper, we propose a new method for electromagnetic interference (EMI) noise analysis using an analog radio-over-fiber (RoF) link, cross domain analyzer, and mobile robot. With this new method, both the phase distribution and amplitude distribution of an electric field radiated by an EMI noise source can be measured. From the measured and simulated results obtained using the method of moments technique, we show that we can differentiate between noise sources in different positions using the phase distribution measured on a measurement circle.
The noise source modulation technique for the determination of electromagnetic noise path
The noise source modulation technique (NSMT) is proposed to determine the electromagnetic noise path when an EMC problem appears. The basic idea behind the NSMT is to apply a known time variation (modulation) to one of the possible noise paths and to observe its effect at the noise victim location. Different modulations can be applied to different noise paths simultaneously. Based on the type and amount of noise modulation at the victim location, the noise path can be determined.
Evaluation technique for EMI anechoic chamber over 1 GHz by plane-wave spectral decomposition and fish-eye lens camera
We propose a new site evaluation technique using plane-wave spectral decomposition and fish-eye lens camera. The proposed method enables to obtain the intensity and the angle of arrival of reflection waves from walls, ground and ceiling of the anechoic and facilitates finding out the cause of the reflection.