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The moment method is used to calculate the rcs of three - dimensional targets in this paper . these targets include conducting targets , dielectric targets and coat targets . triangular patches are used to model the surface of the target , then electric field integral equation ( efie ) and magnetic field integral equation ( mfie ) are built which satisfy the boundary conditions . the rwg vector base functions are used to denote equivalent electric current and magnetic current on the surface of the target . finally use the galerkin method ( rwg vector base functions are basis function and test function ) to transform integral equations into matrix equation . when obtain the equivalent electric current and magnetic current , we can calculate the scattering field and the rcs of the target
本文利用矩量法計算了三維導(dǎo)體目標(biāo)、介質(zhì)目標(biāo)、涂層目標(biāo)的雷達(dá)散射截面。首先采用三角形面元對物體表面幾何形狀進行模擬，然后建立滿足邊界條件的電場積分方程( efie )和磁場積分方程( mfie ) ，將物體表面的等效電磁流用rwg矢量基函數(shù)表示，最后利用伽略金法( rwg矢量基函數(shù)既作為基函數(shù)又作為檢驗函數(shù))將電磁場積分方程轉(zhuǎn)化為矩陣方程求解未知電磁流系數(shù)，得到了表面的等效電磁流后，可以計算散射場和目標(biāo)的雷達(dá)散射截面。