The Research Of Frequency And Space Electromagnetic Scattering Characteristics Of Two-Dimensional Conducting Target

In modern science and technology wars, stealth and anti-stealth technology, target recognition, as well as broadband, ultra-broadband, wide-angle radar technology need to analyse and calculate the broad-band or wide-angle electromagnetic scattering characteristics of radar target, since the broad-band and wide-angle response of the target contains abundant information, which makes the broad-band and wide-angle electromagnetic scattering characteristics has great significance in research in the field of computational electromagnetics.The basic concept of the method of moments(MOM) is introduced firstly, and some fundamental basis function and weight function are discussed. And then MOM for solving two-dimensional perfectly electrical conductor(PEC) target distribution of the surface current and radar cross section(RCS) are analysed. And conventional method and fast algorithm are introduced to analyse the two-dimensional PEC target broadband electromagnetic scattering, which are MOM solution and AWE technology. Since there are some inadequacies in the the AWE technical, finally, higher-order AWE technology is constructed on the basis of high-order method of moments, which not only can calculate electrically large target, but also has the advantages of high-precision in the case of low triangulation, as well as reduces the computer memory and computing time.Secondly, the conventional method MOM is introduced in the two-dimensional PEC target wide-angle electromagnetic scattering, then compressive sensing(CS) theory is introduced, and a new incident excitation source include rich incident angle information is designed based on CS theory framework, and compressed sensing of original induced current is obtained, followed by recovery algorithm to recover the true induced current of the each incidence angle. Finally, in the use of CS combined with high-order basis functions to analyze the problem of wide-angle, this method can remains high accuracy by further reduce the split point, thereby reduce the complexity of this problem, and further save computation time.At last, considering the impedance matrix in MOM is independent from the incedent angle, CS combined with AWE technology to solve the two-dimensional PEC targets frequency and space electromagnetic scattering characteristics in the new incident source, which provides a new solution for solving this problem, and compared with MOM, this method not only can greatly reduces the complexity of this problem, but also greatly reduces calculation time with higher accuracy.