| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程研究所 === 82 === In this thesis, theories and computer programs are developed to
analyze and simulate the shielding effectiveness of two-
dimensional structures over a lossy half space. The
electromagnetic sources considered include overhead power
lines, infinite line source and plane waves. For the shielding
structures, metal wires, dielectric media, and magnetic
materials are studied. Also, the influence from the earth
ground is evaluated. For those electromagnetic shielding
problems, a thin wire model, Moment Method, and a plane-wave
spectrum Green's function are applied to determine the
shielding effectiveness of the cylindrical (two-dimensional)
shielding structures of any shape. Besides, static electric and
magnetic methods are also used to study the shielding
effectiveness of metal wires under power lines. The results
from this study can be employed to analyze and reduce
electromagnetic interferences from overhead power lines and
other electromagnetic radiation sources.
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