基于超材料和FSS的全频微带天线RCS减缩

RCS reduction of the microstrip antenna based on metamaterial and FSS

为了减缩微带天线的雷达散射截面,提出了一种利用超材料和频率选择表面相结合的全频RCS减缩方法。分析了在不同参数下带通FSS的传输系数随频率的变化情况。通过带通FSS减缩带外和超材料吸波体减缩带内RCS的结合,实现整个频带的天线RCS减缩。仿真结果表明,在天线上方加盖FSS和在贴片周边加载超材料吸波体后,天线RCS在整个频带都得到了减缩,且天线的辐射特性基本保持不变。

To reduce the radar cross section of microstrip antenna,a method of combing metamaterials and FSS is put forward.The transmission coefficient of bandpass FSS changing with frequency is analyzed under different parameters.Through the bandpass FSS reducing in-band and absorbing metamaterial reducing outband RCS,the antenna RCS reduction of whole frequency domain is accomplished.The simulated result shows that all the RCS in different frequency are reduced.At the same time,the radiation characteristics of the antenna remains basically unchanged after FSS is put above it and metamaterial loaded around the patch.