This paper describes an expert systems approach, based on symbolic reasoning techniques, to the problem of predicting radiated EMI levels from printed circuit boards. The expert system, currently under development at the University of Missouri-Rolla, USA, starts by extracting board geometry information from the board layout files. This information is fed into the classification algorithm, which determines the signal properties and nature of each net, using the knowledge stored in the knowledge base. The evaluation algorithm uses the available in formation to identify and evaluate critical circuit geometries, and then estimates the effect that these geometries have on system radiation levels. The expert system also looks for violations of basic EMC design rules. The main advantage of such a system over conventional software is that the expert system does not require the user to be an expert in EMC or circuit design.

Meeting Name

IEEE International Symposium on Electromagnetic Compatibility (1997: Aug. 18-22, Austin, TX)


Electrical and Computer Engineering

Research Center/Lab(s)

Electromagnetic Compatibility (EMC) Laboratory

Keywords and Phrases

EMC Design Rule Violations; PCB; USA; Board Layout Files; Circuit Analysis Computing; Circuit Simulation; Classification Algorithm; Computer Simulation; Critical Circuit; Electromagnetic Compatibility; Electromagnetic Interference; Evaluation Algorithm; Expert Systems; Expert Systems Approach; Knowledge Base; Printed Circuit Boards; Printed Circuits; Radiated EMI Prediction; Symbolic Reasoning

International Standard Book Number (ISBN)


International Standard Serial Number (ISSN)


Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 1997 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Aug 1997