中文摘要：

通过分析口径积分、平面波谱理论关于天线近场计算的特点，获得一种混合的天线近场计算方法。结合表面积分技术，提出了口径／谱域积分-表面积分法，用于三维天线-罩系统电性能数值仿真。该方法吸取了口径积分和平面波谱理论的优点，对于天线近场的分析更为精确、实用。以弹载天线罩为仿真实例，结果表明，与口径积分-表面积分法和平面波谱-表面积分法相比，口径／谱域积分-表面积分法的计算结果与实验结果更为吻合，证明了该算法具有更高的精确度。

英文摘要：

Through analyzing the characteristic of antenna near-fields calculation with the aperture integration （AI） theory and the plane wave spectrum （PWS） theory, a hybrid algorithm of antenna near-fields is obtained. By combining it with the surface integration （SI） technique, the aperture integration/spectrum area integration-surface integration （AI/SAI-SI） method is presented, to simulate the electromagnetic performance of three-dimension antenna-radome system. The method united advantages of the AI and the PWS theory is more practical and precise for the analysis of antenna near-fields.By taking a missile radome as simulation exam- ple, the results indicate that the proposed method is more agreeable to the experimental data than the AI-SI method and the PWS-SI method.