Keywords and Phrases
Dipole-moment model; Near-field scanning; Near-field to far-field transformation; Radio frequency interference; Reciprocity
"This dissertation discusses the novel techniques using near-fields scanning to do radio frequency interference (RFI) estimation. As the electronic products are becoming more and more complicated, the radio frequency (RF) receiver in the system is very likely interfered by multiple noise sources simultaneously. A method is proposed to identify the interference from different noise sources separately, even when they are radiating at the same time. This method is very helpful for engineers to identify the contribution of the coupling from different sources and further solve the electromagnetic interference issues efficiently. On the other hand, the equivalent dipole-moment models and a decomposition method based on reciprocity theory can also be used together to estimate the coupling from the noise source to the victim antennas. This proposed method provides convenience to estimate RFI issues in the early design stage and saves the time of RFI simulation and measurements. The finite element method and image theory can also predict the far fields of the radiation source, locating above a ground plane. This method applies the finite element method (FEM) to get the equivalent current sources from the tangential magnetic near fields. With the equivalent current sources, the far-field radiation can be calculated based on Huygens's Principle and image theory. By using only the magnetic near fields on the simplified Huygens's surface, the proposed method significantly saves measurement time and cost while also retaining good far-field prediction"--Abstract, page iv.
Fan, Jun, 1971-
Beetner, Daryl G.
Drewniak, James L.
Electrical and Computer Engineering
Ph. D. in Electrical Engineering
National Science Foundation (U.S.)
Missouri University of Science and Technology
Journal article titles appearing in thesis/dissertation
- Far-field prediction by only magnetic near fields on a simplified Huygens's surface
- Radio-frequency interference estimation using equivalent dipole-moment models and decomposition method based on reciprocity
- Identify the interference from multiple noise sources by magnetic near fields only
xi, 94 pages
© 2015 Jingnan Pan, All rights reserved.
Dissertation - Open Access
Near-fields -- Measurement
Radio -- Interference
Electronic OCLC #
Pan, Jingnan, "Near-field scanning study for radio frequency interference estimation" (2015). Doctoral Dissertations. 2456.