DocumentCode :
1432227
Title :
Radiation of a Hertzian dipole immersed in a dissipative medium
Author :
Tai, C.T. ; Collin, Robert E.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Volume :
48
Issue :
10
fYear :
2000
fDate :
10/1/2000 12:00:00 AM
Firstpage :
1501
Lastpage :
1506
Abstract :
The general radiation formula for a Hertzian dipole immersed in an isotropic dissipative medium of infinite extent has been derived. As a boundary condition of the source, it is assumed that the dipole moment is a given quantity. When the conductivity of the medium is finite, the total radiating power is found to be infinite. Thus, in order to define a finite physically meaningful quantity, the dipole must be “insulated.” The total radiating power is then a function of the thickness of the insulator and the constants of the media. When the radius of the spherical insulator is large compared to a wavelength, the reflection coefficient of the wave traveling from the dielectric to the dissipative medium with the dipole as a source reduces to that of a plane wave as derived from Fresnel´s equations. The similarity between this and the problem by Weyl (1919) is discussed
Keywords :
absorbing media; antenna radiation patterns; dipole antennas; electromagnetic wave reflection; Fresnel´s equations; Hertzian dipole radiation; Weyl problem; dielectric; dipole moment; finite conductivity; general radiation formula; insulator thickness; isotropic dissipative medium; media constants; plane wave; reflection coefficient; source boundary condition; spherical insulator radius; total radiating power; wavelength; Boundary conditions; Conductivity; Dielectrics and electrical insulation; Dipole antennas; Electromagnetic radiation; Fresnel reflection; Maxwell equations; Optical reflection; Physics; Writing;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/8.899665
Filename :
899665
Link To Document :
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