Radiation from Printed Wiring Boards

Abstract

Owing to the ever increasing use of high frequency clock circuits used to control the timing of microprocessors, and to the legal requirements to control radiated as well as con­ ducted electrom agnetic emissions, it is necessary to minimize radiation from printed wiring boards, as they have been found to be serious radiated EME sources, if not carefully designed. This paper describes the results of experiments made to better understand and to isolate some of the parameters that a ffec t radiation levels.