基于减小功率孔径积的天基雷达扫描方式优化

针对天基雷达的性能受限于功率孔径积的情况,利用目标相对于天基雷达覆盖区域的运动方向基本与星下点运动方向相反这一特性,在保证击中目标的前提下得到了一种能有效延长扫描时间的优化扫描方式,从而达到减小功率孔径积的目的。研究同时表明,优化的扫描方式还能较快地击中目标。最后给出了优化扫描方式下系统允许的最大扫描时间。计算机仿真验证了结论的正确性。

Antenna scan optimization for space-based radar subject to reducing power-aperture product

The performance of space-based radar is confined to the power-aperture(PA) product.To overcome this problem,the antenna scan path is optimized based on the fact that the target usually moves in the opposite direction as the nadir point relative to the radar coverage,so that the available scan time(which ensures the target being hit by the antenna mainbeam) is enlarged,and consequently, the PA requirement is reduced.It is also demonstrated that the optimized scan path ensures a much earlier hit on the target.In addition,the maximum scan time corresponding to the optimized scan path is given.The simulations verify the conclusions.