基于PCM的圆极化贴片天线辐射和散射性能一体化设计  

Integrated design of radiation and scattering performance of circularly polarized patch antennas based on PCM

作　　者：陈强 严天赐 贺昌辉[1] 洪亮 李泽楷 CHEN Qiang;YAN Tianci;HE Changhui;HONG Liang;LI Zekai(Air Force EarlyWarning Academy,Wuhan 430019,China)

机构地区：[1]空军预警学院,武汉430019

出　　处：《空天预警研究学报》2024年第2期138-142,共5页JOURNAL OF AIR & SPACE EARLY WARNING RESEARCH

基　　金：国家自然科学基金青年项目(62101592,62201614);湖北省自然科学基金青年项目(2023AFB452)。

摘　　要：针对贴片天线现有设计存在的辐射性能不足及未考虑散射性能的现状,提出了采用极化转换超表面(PCM)改善辐射性能及提升散射性能的一体化设计.通过在偏置馈电方形切角贴片天线周围布局顺序旋转超表面单元并改变排布方式,有效地改善了辐射性能及提升了散射性能.仿真结果表明,最优化布局超表面天线实现了3 dB轴比带宽为5.02~5.39GHz,峰值增益为9.50 dB;相比初始天线,增益平均提升了4.78 dB,工作带宽实现了平均增益8.76 dB与-13.81 dBsm的低RCS;通过改变顺序旋转布局方式,实现了RCS最大缩减量为22.36 dB,比初始布局提高了8.67 dB.通过特征模分析法及散射原理分析验证了本文设计的天线具有良好的辐射和散射性能,该天线有望提升雷达天线隐身与辐射性能.In response to the insufficient radiation performance and lack of consideration for scattering performance in the existing design of patch antennas,this paper proposes an integrated design of using polarization conversion metasurface(PCM)to improve radiation performance and enhance scattering performance.By arranging the sequentially rotated metasurface units around the offset fed square-cornered patch antenna and changing the arrangement pattern,the radiation performance and scattering performance are effectively improved.Simulation results are shown as follows:The optimal layout of the metasurface antenna achieves a 3 dB axial-ratio bandwidth of 5.02-5.39 GHz,and a peak gain of 9.50 dB.The average antenna gain increases by 4.78 dB compared with the initial antenna;the operating bandwidth achieves an average gain of 8.76 dB and a low RCS of-13.81 dBsm.By changing the sequential rotation layout,the maximum reduction of RCS is 22.36 dB,which is 8.67 dB higher than that of the initial layout.The eigenmode analysis and scattering principle analysis are conducted to verify that the antenna designed in the paper has good radiation and scattering performance,and thus the antenna is expected to improve the stealth and radiation performance of radar antennas.

关 键 词：贴片天线 极化转换超表面 圆极化 雷达截面积 辐射性能 散射性能 

分 类 号：TN823[电子电信—信息与通信工程]