Coupling Path Visualization and its Application in Preventing Electromagnetic Interference


A new method to visualize the coupling path is proposed to help solve electromagnetic compatibility problems. By using the reciprocity theorem and the concept of reaction, the coupling density coefficient (CC) is defined. Integration of the CC on closed surfaces equals the coupled power at the receiver. By plotting the CC on a set of surfaces from the source to the receiver, the coupling path, which traces the coupled power flow, can be visualized. All visualization procedures can be performed in a full-wave simulation tool, thus making the proposed method convenient to use. To validate and demonstrate the potential benefits of the new method, visualization of the coupling path in a realistic automotive intentional electromagnetic interference problem is presented. In addition, a mitigation solution based on the visualization result was examined.


Electrical and Computer Engineering

Research Center/Lab(s)

Intelligent Systems Center


National Science Foundation, Grant IIP-1440110

Keywords and Phrases

Coupling Path Visualization; Intentional Electromagnetic Interference (IEMI); Reaction; Reciprocity Theorem

International Standard Serial Number (ISSN)

0018-9375; 1558-187X

Document Type

Article - Journal

Document Version


File Type





© 2020 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

27 Apr 2020