Using TEM Cell Measurements to Estimate the Maximum Radiation from PCBs with Cables Due to Magnetic Field Coupling

Shaowei Deng
Todd H. Hubing, Missouri University of Science and Technology
Daryl G. Beetner, Missouri University of Science and Technology

This document has been relocated to

There were 17 downloads as of 27 Jun 2016.


Common-mode currents can be induced on cables attached to printed circuit boards (PCBs) due to electric and magnetic field coupling. This paper describes a technique for using transverse electromagnetic (TEM) cell measurements to obtain an effective common-mode voltage (or magnetic moment) that quantifies the ability of traces and integrated circuits on PCBs to drive common-mode currents onto cables due to magnetic field coupling. This equivalent common-mode voltage can be used to reduce the complexity of full-wave models that calculate the radiated emissions from a system containing the board. It can also be used without full-wave modeling to provide a relative indication of the likelihood that a particular board design will have unintentional radiated emissions problems due to magnetic field coupling.