Masters Theses

Keywords and Phrases

Electric vehicles; Electromagnetic interference; Equivalent circuit diagrams; Ground via placement; High-speed multiplayer board; Signal changing reference ground


"Digital/Analog ground partitioning has been used to isolate noisy digital and power current from sensitive analog currents in high-speed multiplayer printed circuit boards. The through-hole signal via enables convenient routing and component placement on the PCB and is used for signal interconnections when the signal traces are changing the layers. This design, however, breaks the current return path for signal traces that cross the two separated grounds, which causes undesired effects such as signal distortion and radiated emission.

Electromagnetic mechanism associated with them needs to be understood to control and suppress these undesired effects. In this paper, we have investigated and analyzed the return current path radiated emission peak below 2 GHz for 6-layer camera PCB with a signal trace go across gap and change reference planes. According to the board structure, the power plane is between two ground planes, which can result in the high impedance current path and open edge radiation by the power/ground resonance. Equivalent circuit diagrams are presented built to explain the current path in a practical camera device with the separated ground. Besides, optimal stitching via locations is determined to provide a good return current path and thus suppress the radiated emission. Numerical simulations are conducted for validation in frequency ranges from 10MHz to 2GHz"--Abstract, p. iii


Hwang, Chulsoon

Committee Member(s)

Beetner, Daryl G.
Kim, DongHyun (Bill)


Electrical and Computer Engineering

Degree Name

M.S. in Electrical and Computer Engineering


Missouri University of Science and Technology

Publication Date

Fall 2022


vi, 27 pages

Note about bibliography

Includes_bibliographical_references_(page 26)


© 2022 Xin Fang, All Rights Reserved

Document Type

Thesis - Open Access

File Type




Thesis Number

T 12191