By Kai Li
"Electromagnetic Fields in Stratified Media" offers with a big department of electromagnetic concept, which has many beneficial functions in subsurface conversation, radar, and geophysical prospecting and diagnostics. The publication introduces to the electromagnetic idea and wave propagation in advanced media, whereas proposing targeted versions for varied media: three, four, N-layered media, boundary stipulations, and anisotropic media. specifically, the entire recommendations for a trapped floor wave and lateral wave in a 3- or four-layered quarter, the full recommendations for low frequency wave propagation over a round floor lined with a dielectric layer, and the temporary box of a horizontal dipole within the boundary layer of 2 assorted media are offered. The e-book is designed for the scientists and engineers engaged in antennas and propagation, EM conception and purposes. Dr. Kai Li is Professor at Zhejiang college.
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Additional info for Electromagnetic Fields in Stratified Media (Advanced Topics in Science and Technology in China)
Except for the lateral wave, the trapped surface wave is excited eﬃciently by a vertical electric dipole only when both the dipole and the observation point are on or close to the air-dielectric boundary. 85, εr2 = 80, σ2 = 4 S/m , the real and imaginary parts of λ∗1 /k0 are computed and shown in Figs. 15, respectively. It is seen that the attenuation factor to the thickness of the dielectric layer is discontinuity in the case of k1 l ∈ (0, π/2). 8 2 Fig. 14. 85, and z = d = 0 m, graphs of E0z in V/m due to unit vertical electric dipole for the well conductor with εr2 = 80, σ = 4 S/m are computed and shown in Figs.
62), which are not pure real numbers, can be obtained by using Newton’s iteration method. The imaginary parts of λ∗1 /k0 varying as the thickness l of the dielectric layer are computed and shown in Figs. 10. 5 l (m) Fig. 7. The ﬁrst root λ∗1 of Eq. 5 l (m) Fig. 8. The ﬁrst root λ∗1 of Eq. 5 l (m) Fig. 9. 6, and subject to the condition k02 , the second terms in Eqs. 5 l (m) Fig. 10. 001i wave terms addressed in the paper by King and Sandler (1994). 85) where ε = −ik0 l and p are given in the paper by King and Sandler (1994).
When Θ > 88◦ , both the dipole and observation point are closed to the boundary, the term of trapped surface wave should be considered. When Θ = 90◦ , both the dipole and the observation point are on the air-dielectric boundary, the total ﬁeld is determined primarily by the trapped surface wave. 5 90 Fig. 24. 45, and r0 = 200 m. 5 90 Fig. 25. 45, and r0 = 200 m. 5 90 Fig. 26. 45, and r0 = 500 m. 5 90 Fig. 27. 45, and r0 = 500 m. 5 90 Fig. 28. 45, and r0 = 1000 m. 5 90 Fig. 29. 3, and r0 = 1000 m.
Electromagnetic Fields in Stratified Media (Advanced Topics in Science and Technology in China) by Kai Li