【作者】 杨宁； 钟熠辰； 贾永涛； 刘英；

【Author】 YANG Ning;ZHONG Yichen;JIA Yongtao;LIU Ying;National Key Laboratory of Radar Detection and Sensing,Xidian University;

【机构】 西安电子科技大学雷达探测感知全国重点实验室；

【摘要】 本文提出了一种低复杂度的2-bit极化不敏感可编程超表面天线。超表面工作在5 GHz附近,每个单元仅需5个射频元器件(包括4个p-i-n二极管和1个高频电感器)。提出的超表面单元可以独立控制一对正交的线极化波。通过在微带贴片上开槽来引导射频电流的流动,这有助于抑制交叉极化水平。此外,直流控制电路设计在超表面的背面,提高了系统的集成度。仿真、加工并测试了一个包含144个超表面单元的天线样机。测试结果与仿真结果吻合良好,表明了提出的天线具有29.18%的最大口径效率和45°的最大波束扫描角度。所提出的超表面天线具有口径效率高、极化模式多和复杂度低的特点,在无线通信、雷达探测感知、智能超表面辅助通信等领域具有广阔的应用前景。更多还原

【Abstract】 A 2-bit polarization-insensitive programmable metasurface antenna(PMA)with low complexity is proposed in this paper.The metasurface operates near 5 GHz,and each unit cell of the metasurface has only 5 radio frequency(RF)components(including 4 p-i-n diodes and 1 high-frequency inductor).The proposed unit cell can independently regulate a pair of orthogonal linear-polarization waves.Two slots are introduced in the patch to guide the flow of RF current,which helps to suppress the cross-polarization level.In addition,the direct current control circuits are designed on the back of the metasurface,improving the integration level of the system.A prototype antenna with 144 unit cells is simulated,fabricated,and measured.The measured results are in good agreement with the simulated results,which indicates the proposed antenna has a maximum aperture efficiency of 29.18%,and a maximum beam scanning angle of 45°.Characterized by high aperture efficiency,diverse polarization modes and low complexity,the proposed PMA has broad application potentials in wireless communication,radar detection and sensing,reconfigurable intelligence surface assisted communication and so on.更多还原