Interface extinction and subsurface peaking of the radiation pattern of a line source

1981 ◽  
Vol 26 (4) ◽  
pp. 231-238 ◽  
Author(s):  
N. Engheta ◽  
C. H. Papas ◽  
C. Elachi
Keyword(s):  
Radiation Pattern ◽  
Line Source

ELECTROMAGNETIC RADIATION-PATTERN EFFECTS OF DIELECTRIC LAYERS

1967 ◽  
Vol 45 (9) ◽  
pp. 3119-3128 ◽  
Author(s):  
J. H. Harris
Keyword(s):  
Electromagnetic Radiation ◽  
Radiation Pattern ◽  
Line Source ◽  
Magnetic Line ◽  
Dielectric Layers

A formulation for the radiation pattern of a grounded magnetic line source in the presence of dielectric layers is obtained and the effects of differing permittivity variations are investigated. It is shown that relatively simple bounding functions may be established, and that layers may be employed to obtain both directive and smoothed patterns.

THE DIRECTIVITY PROBLEM FOR A BURIED LINE SOURCE

Geophysics ◽  
1961 ◽  
Vol 26 (5) ◽  
pp. 626-634 ◽  
Author(s):  
Freeman Gilbert ◽  
Leon Knopoff
Keyword(s):  
Radiation Pattern ◽  
Line Source ◽  
First Motion ◽  
Motion Approximation

A method based on the first motion approximation is presented for determining the radiation pattern of a buried line source. If measurements at the surface are used to obtain the P and S components of the source, the multipolar distribution of the source may be determined. The multipolar distribution is not unique since several distributions can have the same radiation pattern. Some examples are presented for simple sources. The method is applicable to real sources or virtual sources such as centers of diffraction or scattering.

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