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研究了降低机载雷达天线散射截面的频率选择表面(FSS)极化扭转板。根据Floquet定理利用模式电压概念建立矢量模式,对二维周期阵列的频率选择表面进行理论分析和计算。设计并加工了一种降低机载雷达天线散射载面的频率选择表面极化扭转板结构。计算和实验表明:频率选择表面的极化扭转板在雷达天线工作通带内保持与原极化扭转板的性能不变,而在工作通带外具有降低雷达散射载面的效果。降低雷达散射截面7～10dB。
The frequency selective surface (FSS) polarization torsion plate to reduce the scattering cross section of airborne radar is studied. According to the Floquet theorem, the concept of mode voltage is used to establish the vector mode, and the frequency selective surface of two-dimensional periodic array is theoretically analyzed and calculated. A frequency selective surface polarization torsional plate structure is designed and fabricated to reduce the scattering of airborne radar antenna. Calculations and experiments show that the frequency-selective surface polarization torsion plate maintains the same performance as the original polarization torsion plate in the passband of the radar antenna, and has the effect of reducing the scattering surface of the radar outside the working passband. Reduce the radar cross section 7 ~ 10dB.