Configurable Reference RF Source and its Radiated Emission Model for Site Correlation

This paper presents a configurable radio frequency reference noise source and its radiated emission (RE) simulation model. This noise source is representative of actual PLC and IO products with a High Speed Gigabit backplane. It is designed to produce a reference noise signature from 30 MHz to 6GHz with radiated emission levels close to the class A electromagnetic radiation disturbance limits of CISPR 11 and CISPR 22. A radiated emission model of this noise source was established to investigate design factors. Multiple emissions scans were performed in two separate semi-anechoic chambers located in different facilities in order to test the repeatability of this noise source. Measurement results indicated that the noise source has very good repeatability and that it can serve as a reference noise source. The results were also used to evaluate the maturity of the simulation technology, as well as, to quantify the difference between chambers.