双圆极化近场成像张量全息超表面  

A Dual-circularly-polarized Tensor Holographic Metasurface for Near-field Imaging

作　　者：薛松[1] 沈一竹[1,2] 许子玉 万文成 胡三明 XUE Song;SHEN Yizhu;XU Ziyu;WAN Wencheng;HU Sanming(State Key Laboratory of Millimeter Waves,Southeast University,Nanjing 210096,China;Purple Mountain Laboratories,Nanjing 211111,China)

机构地区：[1]东南大学毫米波全国重点实验室,江苏南京210096 [2]紫金山实验室,江苏南京211111

出　　处：《无线电工程》2024年第9期2124-2130,共7页Radio Engineering

基　　金：国家自然科学基金(62250610223);江苏省重点研发计划(BE2021007-2);中央高校基本科研业务费(2242023R40059);鹏城实验室重点资助课题。

摘　　要：近场波束赋形可用于近场通信、无线功率传输等领域,而基于全息超表面设计的近场成像天线具有剖面低、无需馈电网络和波束调控灵活等优势。对标量和张量全息超表面近场成像进行了理论推导、仿真分析和实物验证。在此基础上,利用张量全息超表面设计了一款集成平面馈源的近场成像天线,全波仿真和测试结果相吻合,验证了该超表面具有可同时利用左旋和右旋圆极化进行近场成像的能力。Near-field beam shaping can be applied to near-field communication,wireless power transfer,etc.Near-field imaging antennas employing holographic metasurface have the advantages of low profile and flexible beam manipulation,not requiring a feeding network.Theoretical derivation,simulation analysis,and prototype validation of near-field imaging performance are carried out to both scalar and tensor holographic metasurfaces.Using tensor holographic metasurface,a near-field imaging antenna with an integrated planar feed is designed and fabricated.Good agreements are achieved between the simulated and measured results,validating that the metasurface is capable of near-field imaging using both left-and right-handed circular polarization.

关 键 词：全息超表面 近场天线 近场成像 低剖面 阻抗调制 双圆极化 

分 类 号：TN82[电子电信—信息与通信工程]