具有高选频特性和高角度稳定性的无通孔透射式极化扭转超表面
作者单位:

1.南京信息工程大学;2.南京邮电大学

基金项目:

中国国家自然科学基金、江苏省自然科学基金


A Vialess Transmissive Polarization Rotation Metasurface With High Frequency Selectivity and Good Angular Stability
Author:
Affiliation:

1.Nanjing University of Information Science &2.Technology;3.Technology136;4.Nanjing University of Posts and Telecommunications

Fund Project:

61701249和62071238、BK20160959和BK20191399

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    摘要:

    本文提出了一种无通孔透射型极化扭转超表面(PRTM)结构,该PRTM可将线极化入射波的极化方向旋转90°,且具有优秀的频率选择特性和角度稳定性。PRTM采用三层金属贴片和两层基板来实现,其中顶部与底部金属层为相互垂直的极化栅,中间金属层为四角加载矩形贴片的双模矩形环组成的阵列。该PRTM具有两个交叉极化传输极点和一个交叉极化传输零点,其中交叉极化传输零点位置灵活可调。由于交叉极化传输零点的引入,可实现PRTM的上阻带或下阻带具有优秀的频率选择特性。同时,本文对PRTM单元的物理尺寸参数进行了研究,并总结得出了一套PRTM单元设计流程。最后,对两个中心频率f0为15GHz的PRTM样本进行加工和测量,其中测量结果与仿真结果吻合良好。

    Abstract:

    A vialess polarization rotation transmission metasurface (PRTM) with high frequency selectivity is proposed, which can rotate the polarization direction of the linearly polarized incident wave by 90° and has excellent frequency selection characteristics and angular stability. The PRTM unit cell has been implemented with three metallic layers which are separated by two substrate layers, in which the top and bottom metallic layers are the polarizing grids which are perpendicular to each other. Meanwhile, the middle metallic layer is consisted of the array of dual-mode rectangular ring which is miniaturized with four patches additionally loaded at the corners. The PRTM unit cell has two cross-polarized transmission poles and one cross-polarized transmission null, where the cross-polarized transmission zero position is flexibly adjustable.Due to the introduction of the cross-polarized transmission null, the upper or lower stop band of the PRTM unit cell can be achieved with excellent frequency selection characteristics. Then the physical size parameters of the PRTM unit cell has been studied, and a set of design processes of the PRTM unit cell are summarized. Finally, two PRTM prototypes with the center frequency of 15GHz have been fabricated and measured, and measurement results were in good agreement with the simulation results.

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朱熙铖,葛莹,张盼盼,涂刚毅,葛俊祥.具有高选频特性和高角度稳定性的无通孔透射式极化扭转超表面[J].南京信息工程大学学报,,():

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历史
  • 收稿日期:2024-08-02
  • 最后修改日期:2025-03-18
  • 录用日期:2025-03-19

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