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中文摘要：
设计了一种具有低雷达截面的超宽带分形槽缝天线。利用＂突出角＂为90°的Koch分形对方形槽天线进行3次迭代设计后,-10dB阻抗带宽范围由方形槽缝天线的3.0～13.1GHz变为2.8～13.7GHz。仿真和测试结果显示,天线在3GHz和8GHz方向图对称,在整个频段内相对于原天线的增益更稳定,且具有较低的雷达散射截面（RCS）。该天线适用于对超宽带天线具有低RCS要求的场合。
英文摘要：
In this paper,an ultra-wide band fractal slot antenna with low radar cross section（RCS） has been designed.The Koch island with 90°extrusive angles has been implemented through 3 fractal iterations on the base of the square slot,the-10 dB impedance bandwidth range becomes 2.8 ~13.7 GHz from 3.0 ~13.1 GHz of the initial square slot antenna.The simulation and measured results show that the antenna exhibits relatively symmetrical pattern at the frequency of 3 GHz and 8 GHz.Furthermore,it has more stable gain and lower RCS compared with the square slot antenna in the whole frequency band.It can be applied to the occasion of the UWB antenna requiring of low RCS.
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