毫米波高增益折叠透射阵列天线设计

Design of a Millimeter-wave High-gain Folded Transmitarray Antenna

中文关键词:  折叠透射阵列天线  毫米波  低剖面  高增益  多功能超表面

英文关键词:folded transmitarray antenna  millimeter-wave  low-profile  high-gain  multifunctional metasurface

中文摘要:

      文中设计了一款低剖面的毫米波高增益折叠透射阵列天线。该天线将兼具极化选择和相位全覆盖调控性能的 超薄透射型超表面,与具有极化扭转特性的反射型超表面结合,采用π/4 相位补偿步长,在实现低剖面的同时提高了天线 增益。实验表明:所设计天线在94 GHz 增益为35.7 dBi,口径效率为47.4%,3 dB增益带宽为22%。该设计克服了毫米 波天线难以兼顾低剖面和高效率的限制。

英文摘要:

      In this paper a low-profile high-gain folded transmitarray antenna at millimeter-wave band is designed. In the antenna an ultra-thin transmissive metasurface with polarization selection and phase full coverage control is combined with a reflective metasurface with polarization torsion characteristics. The π/4 phase compensation step is adopted to achieve low profile and improve antenna gain. Experiment results show that the designed antenna has a gain of 35.7 dBi at 94 GHz, an aperture efficiency of 47.4% and a 3 dB gain bandwidth of 22%. The limitation of low profile and high efficiency of millimeter-wave antenna is overcome.