| Analysis of Electromagnetic Scattering Characteristics is an important common basic research in the area of radar engineering, which has great significance in the following military applications:Authority in the design and evaluation of radar system; stealth and anti-stealth penetration, target classification and identification, precise guidance and Fuse-Warhead coordination, distant early warning and tracking, and others.In this paper, the method of moments is applied to derive the electric field integral equation of the two-dimensional dielectric body and the volume integral equation of three-dimensional dielectric body. The body was thoroughly analyzed. The method of moments is applied to analyze the electromagnetic scattering character of the two-dimensional dielectric body such as dielectric circular cylinder, dielectric square cylinder, and dielectric triangle cylinder. The method of moments is also applied to calculate the radar cross section of the typical three-dimensional dielectric body such as dielectric sphere and dielectric cube.This paper analyze the broadband electromagnetic scattering characters of the two-dimensional dielectric bodies by combining the asymptotic waveform evaluation (AWE) technique and the method of moments.First, this paper studied the electromagnetic scattering characteristics of two-dimensional dielectric bodies. This paper introduces the electric field integral equation of the dielectric body. Then it derives the radar cross section by combining the definition of radar cross section and Es, EI,which qualitatively analyze the electromagnetic scattering characteristics of the two-dimensional dielectric bodies. An example is the application of method of moments to analyze the electromagnetic scattering characteristics of two-dimensional dielectric circular cylinder, dielectric square cylinder, and dielectric triangle. When comparing the calculated results with that from the analytical method, the data was consistent. It comes to the conclusion that the method of moments is an effective method of solving the electromagnetic scattering characteristics of the two-dimensional dielectric bodies. Second, this paper studied the electromagnetic scattering characteristics of three-dimensional dielectric bodies. This paper derived the volume integral equation of three-dimensional dielectric bodies. It converted the volume integral equation into Matrix Equation to calculate the dyon current coefficient, which qualitatively analyze electromagnetic scattering characteristics of the three-dimensional dielectric bodies. An example is the application of method of moments to analyze the electromagnetic scattering characteristics of three-dimensional dielectric sphere and dielectric cube. When comparing the calculated results with that from the analytical method, the data was very consistent. It comes to the conclusion that the method of moments is an effective method of solving the electromagnetic scattering characteristics of the three-dimensional dielectric bodies.Finally, this paper describes the basic principle of asymptotic waveform evaluation (AWE). This paper also applies the combination of the AWE technology and method of moments into the calculation of the examples. The paper calculates the radar cross section of two-dimensional dielectric bodies and analyzed the broadband electromagnetic scattering characteristics of dielectric circular cylinder and dielectric square cylinder. The calculated data indicates that applying the combination of AWE technology and method of moments can calculate the radar cross section for a dielectric body in a given frequency band. The result from this new method is consistent with the result by using the point to-point calculation of the traditional method of moments. And computing time has been effectively reduced.
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