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• W2561939188 abstract "We have constructed a physicomathematical model of scattering of electromagnetic waves by a homogeneous object immersed in a material hal/space, which allows for anisotropy of electromagnetic properties of the scatterer and surrounding medium. This model is motivated by the need for remote sensing, nondestructive testing, and microwave devices and is based on the numerical solution of a system of integral equations for the electric field components inside an inclusion using the method of moments. We present numerical ezamples that illustrate wave scattering by an inhomogeneity in sea ice and polymer composite. 1. In this paper we discuss a theoretical problem, which is a key problem in remote sensing, nondestructive testing, and microwave devices and is based on the modeling of an electromagnetic field scattered by a subsurface inclusion allowing for anisotropy of electromagnetic properties of the scatterer and the surrounding medium. As is known, anisotropy plays an important role in the formation of a radar signal from such natural media as sea ice or snow [1] and, therefore, it must be taken into account when interpreting the data obtained from sounding of the above media. Anisotropy is also typical of polymer composites where it is due to the anisotropic properties of reinforcing fibers or particles, for example, carbon, and their orientation in space [2]. It is natural that correct models of radiowave control of polymer composites must show this property. Using anlsotropic materials in microwave devices allows us to improve significantly the functional properties of dielectric waveguides and elements based on them (filters, antenna, etc.) [3], and, therefore, we must increase our knowledge of the interaction between electromagnetic waves and the above materials. The major part of the previous papers dealing with wave scattering from bodies located under the surface of a medium consider the case in which the surrounding medium as well as the scatterer, if it is permeable to the field, are isotropic [4--6]. On the other hand, papers in which an object in an anlsotropic medium is considered are mainly devoted to homogenous media without interfaces [7, 8]. This paper is an attempt to generalize the known physicomathematical model of radiowave scattering by surface objects to the case in which a homogeneous dielectric halfspace with an iv_homogeneous dielectric body immersed in the latter are characterized by anisotropy of electrophysical characteristics. Because of the complexity of the general 3-D problem, we draw our attention to a simpler 2-D model of the scatterer in the form of an infmitely long cylinder parallel to the interface when the scatterer is h~homogeneous only in the cross section and the wave propagates normally to the cylinder. In addition, we assume that the permittivity teusors of the body and the medium have a simplified form which permits existence and separate analysis of the E- and H-polarized fields. For numerical solution of the problem posed, we use the method of integral equations with respect to the internal field of the inclusion [9] along with the method of moments [8, 10, 11]." @default.
• W2561939188 created "2017-01-06" @default.
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• W2561939188 date "1997-01-01" @default.
• W2561939188 modified "2023-09-27" @default.
• W2561939188 title "EFFECT OF ANISOTROPY OF A MEDIUM ON THE SCATTERING" @default.
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• W2561939188 hasPublicationYear "1997" @default.
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