圆孔与三极子组合单元频率选择表面研究

应用谱域法分析了圆孔与三极子组合单元频率选择表面(FSS)的频率响应特性。分析了组合单元的结构参数、电磁波极化和入射角度对其稳定性的影响。研究结果表明,该组合单元的频率响应特性曲线具有明显的两个阻带和一个通带,且具有良好的极化稳定性和角度稳定性。在结构参数中,圆孔大小对频率响应特性曲线的位置影响较大,极子长度对传输带宽影响较大,而极子宽度影响较小。通过单元结构参数调整,可获得良好的宽带传输和陡峭下降边缘特性,实现相临波段信号分离和多波段通讯。该结构FSS可应用于卫星通讯、雷达罩及其他相关领域。

Study of Frequency Selective Surface Element Composed of Circular Aperture and Three-legged

The frequency response properties of composite element frequency selective surface (FSS), composed of circular aperture and three-legged, are analyzed based on the spectral domain method. The effect of structure parameters, the stability of polarization electromagnetic wave and incident angle are analyzed for the composite element. The result shows that the frequency response properties of the composite element have two stop-band and one pass-band obviously. The composite element has a good stability of polarization and incident angle. In the structure parameters, the size of circular aperture has more influenced to the location of the frequency response property curve than the others factors, the length of three-legged has big influenced to the transmission bandwidth, and the width of three-legged has small influenced to the frequency response property. The width-band transmission and the sharp skirt properties are obtained by the adjustment of the structure parameters, and the adjacentSsignal separation and multi-band communication are realized. The composite FSS can be used in satellite communications, radomes and other fields.