Effects of Gapped Groundplanes and Guard Traces on Radiated EMI

Fei Sha
James L. Drewniak, Missouri University of Science and Technology
Todd H. Hubing, Missouri University of Science and Technology
D. S. Britt
Thomas Van Doren, Missouri University of Science and Technology
David M. Hockanson

This document has been relocated to http://scholarsmine.mst.edu/ele_comeng_facwork/997

There were 2 downloads as of 27 Jun 2016.

Abstract

Designers sometimes employ gapped reference planes to isolate analog and digital signals, and separate "quiet" and "noisy" ground structures by providing a series impedance. Guard traces are also used to reduce unwanted coupling to adjacent traces, which can lead to signal integrity or EMI problems. This study investigates the impact of gaps and guard traces on radiated EMI. A simple microstrip circuit was constructed to experimentally analyze the effects of groundplane gaps and guard traces.