采用口径积分-表面积分(AI-SI)算法,对带罩机载阵列天线进行了分析。雷达罩的介质反射是引起天线方向图副瓣抬升的主要原因,在传统的AI-SI法分析天线罩过程中没有考虑天线金属阵面对天线罩介质反射的影响,因此,带来较大的计算误差。为了避免上述问题,文中在分析带罩天线过程中,采用了理想源阵列加反射板模型。天线罩总的透射场为阵列天线的一次透射场与反射板产生的二次透射场的叠加。为验证算法的正确性,将AI-SI算法计算结果与CST软件仿真结果进行了比较,两者吻合较好。

The method of aperture-integration, surface-integration has been used to analysis airborne radome. The reflection of radome is the main reason of the side lobe level increasing. Traditionally, due to discarding the interaction between the radome and the antenna array conductor surface, it brings a large error of the pattern. In order to avoid the problem, the ideal array antenna with baffle-board model is taken account. The total transmitted fields of radome are equivalence with first-transmitted fields of array antennas and second-transmitted fields of battle-board. Compared with the results of AI-SI method and the simulated results of CST software, the results agree well with each other.