Masters Theses


Yang Zhong

Keywords and Phrases

Coupling path visualization; Intentional electromagnetic compatibility


"A new method to visualize coupling path is proposed to help solve EMI problems. Based on the reciprocity theorem and the concept of reaction, coupling coefficient (CC) is defined to characterize coupling power density. For two-port networks, surface integral of CC can represent coupled voltage on the open-circuited port or coupled power on the loaded port. For dipole-moment based systems, surface integral of CC can represent coupled field components. The calculated CC should be a complex scalar at each point. By properly adjusting the excitation phases, the imaginary part of surface integral of CC will be zero and thus can be ignored. Also, the conservative property of the surface integral of CC makes it suitable for tracing the coupling path. Therefore, the coupling path visualization is fulfilled by plotting the real part of CC over the space between aggressor and victim. The calculated CC in rectangular coordinates has been applied in several full-wave simulations, and the coupling paths between aggressor and victim are clearly visualized. However, the limitation of using CC in rectangular coordinates is that the coupling paths around the aggressor or victim cannot be well characterized because the CC in rectangular coordinates is invalid in the region that is not between aggressor and victim. The CC in spherical coordinates is proposed to overcome this limitation. It also has been successfully applied in the coupling visualization for automotive intentional electromagnetic interference (IEMI) simulation"--Abstract, page iii.


Hwang, Chulsoon

Committee Member(s)

Fan, Jun, 1971-
Pommerenke, David


Electrical and Computer Engineering

Degree Name

M.S. in Electrical Engineering


Missouri University of Science and Technology

Publication Date

Spring 2019


ix, 44 pages

Note about bibliography

Includes bibliographical references (pages 42-43).


© 2019 Yang Zhong, All rights reserved.

Document Type

Thesis - Open Access

File Type




Thesis Number

T 11569

Electronic OCLC #