As an important source of the warship radar reflection, mast will directly affect the stealth performance quality of overall warship. In this paper,based on the typical radar detection conditions and the characteristics of large electrical size of mast,the design of type-45 destroyer' s mast was taken as the RCS model to analysis and evaluate by the physical optics ( PO). Then, according to electromagnetic theory, radar scattering characteristics of the mast were discussed. The radar cross section distributions of mast models which have different surrounded board' s angle were compared and multiple evaluated by four existing criteria: the maximum RCS value within the threat area, the average RCS value within the threat area, the average probability of radar detection and the probability greater than the critical RCS value. Then, the improving proposal of the basic mast' s parameters was put forward. The result indicates that the initial mast model has a good performance in every criterion,and the design of type-45 destroyer' s mast is reasonable.%桅杆作为舰船雷达反射的重要源,将直接影响到舰船的整体隐身性能.基于特定的雷达探测条件,采用物理光学法,针对英国45型驱逐舰桅杆RCS的分布情况进行计算,并结合电磁理论对该舰船桅杆的雷达散射机制进行研究.在此基础上,分别以威胁区域内RCS的最大值、平均值、雷达检测的平均概率及大于临界RCS值概率的4种已有指标对不同围板倾角桅杆模型的隐身性能进行多重评估,并提出修改方案.结果表明,原桅杆模型各项指标良好,该舰船桅杆设计较为合理.
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