| Research on wide-band electromagnetic scattering characteristics from targets is an important topic in the computational electromagnetic. The analysis of wide-band electromagnetic scattering characteristics is very important in many fields such as modern radar target identify, target stealth technology microwave imaging and remote sensing. Wide-band scattering problems are a research topic that has a challenge, important meaning and application.The analysis of wide-band electromagnetic scattering characterizers is very slow using the traditional method if moments. (MOM), because one must calculate repeatedly at each frequency. In order to obtain precise frequency response to small frequency interval when the target with frequency RCS drastic change, this means the matrix solution will spend a lot of time on the computer in the frequency range. So faster and more accurate calculation method of analysis on target broadband electromagnetic scattering has very important significance in the computer resources conditions. In this paper, the asymptotic waveform evaluation technique based on the method of moment has solved the problem about computer unit; it can achieve rapid analysis in calculating target wide-band electromagnetic scattering characteristics.The wide-band electromagnetic scattering characteristics from different conductors are analyzed using frequency domain method in this thesis. The theory of method of moments is introduced firstly, and some basic functions and testing functions are discussed, and the basic step for solving the radar cross section target is expounded. Then the theory of asymptotic waveform techniques is also discussed, and the RCS accuracy in the asymptotic waveform evaluation techniques is analyzed. Finally the wide-band electromagnetic scattering characteristics of the two-dimensional and three-dimensional conducting objects are analyzed with the method of moment and the asymptotic waveform evaluation technique. |
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