(3)Compared with detection point three, low-frequency
components of 1GHz or below are more in detection point one
and two, while high-frequency components are less. However,
according to the simulation results of GIS model with onephase
single enclosure in the literatures, the proportion of
frequency components is supposed to be inversely proportional
to the diameter of GIS shell, which is just contrary to the
simulation results in this study. This indicates that the
propagation properties of electromagnetic waves are different
in the simple or complex structure of GIS.