中文摘要：

利用表面积分方程（SIE）和矩量法（MoM）对加罩天线阵的辐射特性进行了整体严格建模．通过预条件技术（PT）和快速多极子方法（FMM），明显改善了MoM矩阵方程的性态，降低了计算机内存占用，加速了共轭梯度法（CG）的收敛速度．对几种加罩天线阵进行了数值仿真，分析了天线罩有关参数对天线阵辐射特性的影响．结果表明，天线罩的介电常数、尺寸、形状等参数对天线阵辐射特性有显著影响．

英文摘要：

The exact model of an antenna array with a dielectric radome is established using the surface integral equations（SIE） and the method of moments（MoM）. The proper preconditioning techniques（PT） and the fast multipole method are employed, which obviously improves the property of the MoM matrix equation, reduces the memory occupation and accelerate the iteration convergence of the conjugate gradient （CG） method. Several antenna arrays with dielectric radomes are numerically simulated, and their radiation characteristics are analyzed. Numerical results showed that the permittivity, size, shape and other factors of radome have great influences on the radiation characteristics of antenna array.