基于超材料完全吸收器的低RCS微带天线

为降低微带天线雷达散射截面(RCS),提出了一种基于超材料完全吸收器的微带天线。通过电磁场仿真软件设计了一种和微带天线工作频带匹配的圆环宽频带超材料吸收器,并将其加载在传统微带天线上制作成基于超材料完全吸收器的微带天线。实验结果表明,保持天线辐射性能不变的情况下,超材料吸收器可以有效减小天线RCS,其中,正面0°方向的RCS值最大缩减达到了-15.8 dB。

A Low RCS Microstrip Antenna Based on Metamaterial Absorber

In order to reduce the radar cross section (RCS) of the microstrip antenna, a microstrip antenna based on the metamaterials prefect absorber is presented. The working band of the microstrip antenna which matchs with a circular wide-band metamaterial absorber is designed by using the electromagnetic field simulation software. The metamaterial absorber is loaded on the substrate of the conventional microstrip antenna. It is demonstrated that, as compared with the conventional patch antenna, antenna RCS can be reduced by 15.8 dB on the 0 degree direction. Meanwhile, the proposed antenna can still maintain good radiation characteristics.