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本文简要叙述了飞行器隐身技术中通常采用的三种方法。飞行器采取上述隐身技术措施后,机载雷达天线对电磁波的散射成为飞行器的主要散射源。因此,天线隐身技术的研究就显得十分重要。本文介绍的频率选择表面(FSS)是一种由无源谐振单元,按一定排列方式组成的准二维平面周期结构,利用其对电磁波具有频率及极化的双重滤波的概念,以达到降低天线雷达截面积(RCS)的效果。文中用谱域分析法对十字形振子阵FSS的特性进行了分析计算,并应用于天线罩或低RCS反射面天线中。对已加工出的面积为42×42cm~2,在聚四氟乙烯玻璃纤维布上的十字形振子阵FSS样品进行了性能测试,从测试曲线看出方法是有效的。
This article briefly describes the three methods commonly used in aircraft stealth technology. After adopting the stealth technical measures mentioned above, the scattering of the electromagnetic wave by the airborne radar antenna becomes the main scattering source of the aircraft. Therefore, the research of antenna stealth technology is very important. The frequency selective surface (FSS) introduced in this paper is a kind of quasi-two-dimensional planar periodic structure composed of passive resonance units and arranged in a certain arrangement. By using its concept of dual filtering with frequency and polarization on electromagnetic waves, Radar cross-sectional area (RCS) effect. In this paper, the characteristics of the cross-shaped oscillator array FSS are analyzed and calculated by the spectral domain analysis method, and applied to the radome or low RCS reflector antenna. The processed cross-shaped FSS samples on polytetrafluoroethylene fiberglass cloth were tested for the performance of 42 × 42cm ~ 2 area. The results show that the method is effective.