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.
Automatic site-VSWR measurement using mobile robot platform
We have developed an automatic site-VSWR (SVSWR) measurement system using a mobile robot platform and an optical microwave transmitter. The proposed system can rapidly evaluate the performance of EMI anechoic chambers. In this paper, we explain the SVSWR measurement results obtained with the proposed system and the device configuration. The positional accuracy of the system is also explained.
Optical fiber link antenna and EMI measurement system using optical biased devises
We propose an optical fiber link antenna and electromagnetic interference measurement system that consists of a receiving optical fiber link system, and a RF amplifier with photovoltaic power converter. Our proposed optical receiving system can measure less than -100 dBm input level from 1 GHz to 6 GHz. Our proposed transmitting optical system can radiate more than -20 dBm RF output level from 1 GHz to 6 GHz [1]. It is proved that our proposed optical system can be used to evaluate the antenna measurement with more than 100 dB dynamic range. Our proposed system can use radiated electromagnetic interference measurement over 1 GHz without metal cables.