Doctoral Dissertations

Keywords and Phrases

desense; electromagnetic coupling; radiated emission; Radio frequency interference; spectrum

Abstract

"Radio frequency (RF) interference can degrade the receiving sensitivity of antennas (desense problem). It is essential to model the nonlinearity as it is the root-cause of the unwanted frequency components. Understanding the electromagnetic (EM) coupling or radiated emissions is also important.

Nonlinearity causes modulation-involved desense problems, and it consists of two categories: upconvertion of the baseband noise by the transmitting (TX) signal, and the passive intermodulation (PIM) of the transmitting signal itself. The upconvertion caused desense can be modeled and analyzed with the dipole-moment based coupling framework. PIM has been identified as another nonlinear distortion mechanism, specifically in the metallic contacts. Capacitive RF contacts are proposed and validated to resolve PIM problems using the anodized layer to skip the quantum tunneling of the metallic contact interfaces. While two-tone test has been mostly adopted in the PIM related studies for measurement characterizations, the link between the two-tone tests and broadband sideband is missing. Therefore, another essential work has been done to establish a link to correlate the two-tone results and wideband sideband spectrum levels.

The proper RF interference control measures for complicated electronic devices without clear geometry information, can be evaluated in a statistical way with a segmentation approach. The segmentation approach allows a faster estimation of the EM coupling levels/RF susceptibility, leading to a better insight of the coupling mechanism and more appropriate interference control solutions" -- Abstract, p. iv

Advisor(s)

Hwang, Chulsoon
Fan, Jun, 1971-

Committee Member(s)

Beetner, Daryl G.
Kim, DongHyun (Bill)
He, Xiaoming

Department(s)

Electrical and Computer Engineering

Degree Name

Ph. D. in Electrical Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Summer 2024

Pagination

xiii, 121 pages

Note about bibliography

Includes_bibliographical_references_(pages 35, 47, 75, 107 & 112-120)

Rights

©2024 Shengxuan Xia , All Rights Reserved

Document Type

Dissertation - Open Access

File Type

text

Language

English

Thesis Number

T 12364

Electronic OCLC #

1478135081

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