Impact on EMI profile due to monitor stand high frequency resonance effects

Abstract

Dell has developed a new method for analyzing the shielding effectiveness and high frequency resonance of different mechanical structures. This method utilizes the Spherical Radiating Standard (SRS) dipole antenna as a stable source, which is placed directly inside the mechanical structure (e.g., computer chassis or monitor stand). By utilizing such a method, quantifiable and repeatable emission measurements can be made when analyzing these different mechanical structures. The purpose of this study was to; 1) analyze the high frequency resonance effect of a monitor stand (MS) utilizing the SRS antenna: and 2) correlate these results with an actual real life setup (portable computer and port replicator inserted into MS).