A novel scanning structure of cross -circumscribed beam overlap arrangement for airborne planar phased array radar is presented, which can reduce the beam shape loss under the triangular and rectangular beam overlap arrangements. The beam shape loss and energy distribution and central detection probability of these structures are analyzed and compared, and the optimal elevation angle and azimuth angle adapt to the cross-circumscribed lattice is deduced. Simulation results show that the cross-circumscribed lattice has the lowest beam shape loss, and it can elevate the central detection probability, and in favor of the integrality of scanning.%针对传统机载平面相控阵雷达扫描方式所采用的矩形栅交叠结构和三角栅交叠结构所引出的波束形状损失问题,提出了一种新的交叉外切式交叠结构.分析并比较了3种结构的波束形状损失及能量分布图,推导了交叉外切式结构的优化俯仰角和方位角以及中心检测概率.仿真结果表明,交叉外切式结构波束形状损失最小,可以提高雷达中心检测概率,有利于实现雷达的完整性扫描.
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