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The propagation of high-frequency electromagnetic plane wave in the dielectric is complex, and the energy distribution is uneven after scattering. Aimed at these problems, the propagation of high-frequency electromagnetic plane wave (microwave) in dielectric is researched in this paper by finite element software ANSYS. The electromagnetic scattering results are obtained by establishing and solving...
The principle of genetic algorithms is introduced in the paper. The microwave tomography can be carried out by the genetic algorithm which can display the internal medium distribution without destructing its structure under detection. The finite element method is used to calculate the electromagnetic scattering value, and the inverse electromagnetic scattering imaging method is based on the idea of...
In the application of finite difference time domain (FDTD) method to simulate high frequency electromagnetic field distribution in space, not only the contribution of the incident electromagnetic waves, but also influence of reflection electromagnetic waves should be considered. Two kinds of typical absorbing boundary conditions algorithm of the FDTD method are present, which are PML absorbing boundary...
In this paper, the method for measuring the complex permittivity of concrete has been proposed, and using this method the complex permittivity of concrete is measured. This method for calculating the dielectric constant of concrete is used by measuring the deflection and the loss of electromagnetic wave in concrete block for experiments. The measuring device used is a single frequency radar. Measurement...
In this letter, we examine the approximate transient field of a horizontal electric dipole excited by a Gaussian pulse on the boundary between a homogeneous isotropic medium and a one-dimensionally anisotropic medium in detail. The final formulas of the transient field are expressed in terms of several fundamental functions. The derivations and computations show that the three time-dependent electric...
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