一种基于等效间距法的低散射阵列设计

Low scattering patch array design based on equivalent space analytical method

针对阵列天线在某些角域出现强散射的现象,提出了一种等效间距法并分析了强散射点的产生机理,给出了抑制散射峰值同时满足辐射要求的最佳折中阵列间距确定准则。运用该方法对8单元贴片阵列进行了实例验证,结果表明:设计的贴片阵列可以在满足辐射性能的基础上,带内和带外单站雷达散射截面的强散射点得到了有效抑制,使其在绝大多数入射角处于低散射状态,从而证明了该方法可以快速、有效地指导兼顾辐射性能的低散射阵列设计。

A new method based on equivalent space analytical（ESA） is proposed in this paper.In this method,the strong scattering from an equally spaced array can be considerably reduced at some certain directions by radiation and scattering tradeoff design.In order to illustrate the validation of proposed method,a 1×8 patch array antenna is designed using both this novel technology and the conventional one.Compared with traditional array design,the inband and outband RCS spots of strong scattering are considerably reduced,and the proposed method makes be at the status that it scatters with low level for most incident angles.The results show that the proposed method is feasible and effective for designing the antenna array.ger wire diameter can be revised by the experience formula of the equivalent coefficient.