The Electromagnetic Fields of a Vertical Electric Dipole in the Presence of a Large Stratified Sphere

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Nov 16, 2013 (3 years and 8 months ago)

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Progress In Electromagnetics Research Symposium 2006,Tokyo,Japan,Agust 2-5 197
The Electromagnetic Fields of a Vertical Electric
Dipole in the Presence of a Large Stratified Sphere
T.Fei,L.W.Li,and T.S.Yeo
National University of Singapore,Singapore
Q.Wu
Harbin Institute of Technology,China
The electromagnetic fields of a vertical dipole radiating in the presence of a stratified sphere is
represented by infinite summation in spherical systems.It is known that the series usually has conver-
gence problem when both the source and the observation point are on or close to the surface.For an
electrically large sphere,the field is more difficult to calculate because the number of the series terms
is about 10ka (a is the radius of the sphere,k is the wave number).
In this paper,a convergence acceleration method is used to compute the fields generated by a
vertical electric dipole over a stratified large sphere.As a practical and interesting application,the
simulation results are given for the fields near the surface of the earth.The convergence property
is analyzed.The results are also compared with those by asymptotic methods based on Watson
transformation.