DIFFRACTION OF ELECTROMAGNETIC WAVES BY AN INHOMOGENEOUS SPHERE

Geophysics ◽  
1962 ◽  
Vol 27 (4) ◽  
pp. 480-492 ◽  
Author(s):  
Janardan G. Negi
Keyword(s):  
Half Space ◽  
Electromagnetic Waves ◽  
Homogeneous Medium ◽  
Electromagnetic Response ◽  
General Situation ◽  
Conductivity Distribution ◽  
Conducting Sphere ◽  
Conductivity Variation ◽  
Magnetic Contrast ◽  
Inhomogeneous Sphere

The electromagnetic response of an inhomogeneous conducting sphere (having radial conductivity distribution) embedded in an infinite homogeneous medium is investigated. The effect of linear conductivity variation and magnetic contrast between the two media is discussed in detail and relevant curves are presented. Analytical results are further extended to a more general situation in which this sphere is located in a half‐space and the influence of air‐earth boundary is calculated. These results may be applied to geoelectrical interpretation.

Electromagnetic response of a permeable inhomogeneous conducting sphere

1973 ◽  
Vol 11 (1-3) ◽  
pp. 1-20 ◽  
Author(s):  
Janardan G. Negi ◽  
Chandra P. Gupta ◽  
Upendra Raval
Keyword(s):  
Electromagnetic Response ◽  
Conducting Sphere

Surface electromagnetic waves at the interface between a homogeneous medium and a system of coupled waveguides

2008 ◽  
Vol 105 (4) ◽  
pp. 585-590 ◽  
Author(s):  
B. A. Usievich ◽  
J. Kh. Nurligareev ◽  
V. V. Svetikov ◽  
V. A. Sychugov
Keyword(s):  
Electromagnetic Waves ◽  
Homogeneous Medium ◽  
Surface Electromagnetic Waves ◽  
Coupled Waveguides

Analysis for Scattering of Non-homogeneous Medium by Time Domain Volume Shooting and Bouncing Rays

2021 ◽  
Vol 36 (3) ◽  
pp. 245-251
Author(s):  
Jun Li ◽  
Huaguang Bao ◽  
Dazhi Ding
Keyword(s):  
Time Domain ◽  
Electromagnetic Scattering ◽  
Electromagnetic Waves ◽  
High Efficiency ◽  
Homogeneous Medium ◽  
Reflection And Transmission ◽  
Transmission Coefficients ◽  
Transient Electromagnetic ◽  
Frequency Domain Methods ◽  
Scattered Fields

In order to evaluate scattering from hypersonic vehicles covered with the plasma efficiently, time domain volume shooting and bouncing rays (TDVSBR) is first introduced in this paper. The new method is applied to solve the transient electromagnetic scattering from complex targets, which combines with non-homogeneous dielectric and perfect electric conducting (PEC) bodies. To simplify the problem, objects are discretized into tetrahedrons with different electromagnetic parameters. Then the reflection and transmission coefficients can be obtained by using theory of electromagnetic waves propagation in lossy medium. After that, we simulate the reflection and transmission of rays in different media. At last, the scattered fields or radiation are solved by the last exiting ray from the target. Compared with frequency-domain methods, time-domain methods can obtain the wideband RCS efficiently. Several numerical results are given to demonstrate the high efficiency and accuracy of this proposed scheme.

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