高频雷达多波束最优天线方向图综合

Optimal antenna radiation pattern integration for multi-beam forming in high frequency radar

在高频雷达中 ,多个部分重叠的波束被用来形成对预定空域的覆盖 ,而射频干扰和期望信号的空间结构之间的差异以及接收天线阵列的空间多样性则被用来抑制干扰以提高高频雷达的整体工作性能。然而如何在实时地形成多波束的同时有效地抑制射频干扰仍然是高频雷达一个急待解决的问题。基于最优天线方向图综合方法 ,通过主瓣形状保持和干扰抑制之间的合理折衷进一步提出了多波束形成算法。仿真结果表明该算法可以快速、灵活地形成多个波束来覆盖预定的空域 ,同时最大限度地抑制射频干扰 。

In high frequency (HF) radar, multiple partially superposed beams are formed to cover a spe cified spatial area while the difference between the spatial structure of the unwanted radio frequency interference and that of the desired signals, and the spatial diversity of the antenna array are utilized to mitigate the interference to improve the gross performance of the radar. However, the problem remains unsolved as to real time multi beam forming and effective suppression of interference in HF radar. In this paper, based on optimal antenna radiation pattern integration methods, a multi beam forming algorithm is proposed through a reasonable compromise between maintaining the main beam shapes and suppressing the interference. Simulation results show that with this algorithm multiple beams may be formed fleetly to cover the prescribed spatial area, suppress the interference and thus greatly improve the performance of the HF radar.