【摘要】 文章研究了Vivaldi天线的散射特性,根据分析Vivaldi天线的工作特点,在不破坏辐射单元上电流分布的情况下,通过改变辐射贴片的外形,设计出了一种低RCS双指数Vivaldi天线。与常规Vivaldi天线相比,改进天线在2GHz～8GHz的宽频带范围内单站RCS得到了很好的减缩,而相对带宽基本不变,工作频带内增益最大损失0.4dB。更多还原

【Abstract】 The scattering characteristics of Vivaldi antenna is studied in this thesis.On the basis of analysis on the features of Vivaldi antenna,a dual exponential Vivaldi antenna with low RCS is designed by altering the shape of original antenna under the condition that the current distribution of radiating element is not destroyed.Compared with conventional Vivaldi antenna,monostatic RCS of improved Vivaldi antenna within wide frequency band from 2GHz to 8GHz is greatey reduced and the relative bandwidth is almost the same and the most gain loss of working frequency band is only 0.4dB.更多还原