【作者】 尹佳宁； 张云华； 陈茹萌；

【Author】 YIN Jianing;ZHANG Yunhua;School of Electronics and Information,Wuhan University;

【机构】 武汉大学电子信息学院；

【摘要】 本文提出了一种集成反射阵天线和透射阵天线于一体的双向阵列天线。首先,提出了一种宽带透-反单元,它由四层金属贴片和3层介质组成,可以透射y极化入射波同时极化转换为x极化波,也可以反射x极化入射波。该单元具有低损耗和两种极化低耦合的特性,即高幅度和两种极化可以实现独立的相位控制,互不影响。然后,引入了一种相位综合优化方法来分别设计宽带的多功能阵列天线的透射部分和反射部分.为了验证上述方法,大小为180 mm×180 mm的30×30个单元的超表面天线采用偏馈的形式在12 GHz～23 GHz频段。仿真结果显示透射阵的最大增益在26.15 dB,1 dB带宽为0.4647,口径效率为45.57%,反射阵的最大增益在28.29 dB,1dB带宽为0.4277,口径效率为56.19%。更多还原

【Abstract】 An ultra-wideband space-fed bi-directional antenna integrating transmitarray(TA) and reflectarray(RA)is proposed in this communication.First,a wideband element is introduced with four-layer patches etched on three dielectric substrates,which could control the phase of transmitted/reflected waves with different polarizations independently.This element has features of high efficiency and excellent isolation between two polarized modes.Then phase synthesis approach is introduced to design multifunctional metasurface.An optimization approach of reference phases is applied to achieve the wideband properties of TA/RA respectively.A 30*30-element-offset-fed metasurface antenna with an aperture area of 180 mm× 180 mm is designed,fabricated and measured in frequency band of12 GHz～23 GHz.The simulated results show that the TA has a peak gain of 26.15 dB with an aperture efficiency of 45.57% and 1 dB gain bandwidth of 46.47%.The RA has a peak gain of 28.28 dB with an aperture efficiency of56.19% and 1 dB gain bandwidth of 42.77%.更多还原