一种用于±45°极化十字型偶极子天线阵列的解耦方法

袁航; 陈付昌; 向凯燃

doi:10.12263/DZXB.20250172

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一种用于±45°极化十字型偶极子天线阵列的解耦方法

学术论文 | 更新时间：2025-12-10

- 一种用于±45°极化十字型偶极子天线阵列的解耦方法
- A Decoupling Method for ±45°-Polarized Crisscross-Shaped Dipole Antenna Array
- 电子学报 2025年53卷第7期页码：2453-2460
- 作者机构：
  
  华南理工大学电子与信息学院，广东广州 510641
- 作者简介：
  
  [ "袁航男，1998年6月出生于广东省揭阳市.华南理工大学电子与信息学院博士研究生.主要研究方向为滤波天线、基站天线、阵列去耦、频率选择表面、滤波器等. E-mail: eeyuanhang@mail.scut.edu.cn" ]
  [ "陈付昌男，1982年12月出生于江西省抚州市.华南理工大学电子与信息学院教授.主要研究方向为用于微波和毫米波应用的滤波器和相关射频模块的综合理论与设计. E-mail: chenfuchang@scut.edu.cn" ]
  [ "向凯燃男，1995年2月出生于广东省清远市.华南理工大学电子与信息学院博士后.主要研究方向为综合理论、微波滤波器、滤波天线和阵列、全双工天线、频率选择性表面以及毫米波应用. E-mail: eekrxiang@scut.edu.cn" ]
- 基金信息：
  
  国家自然科学基金(62471186);广州市科技规划项目(2024A04J6306)
- DOI：10.12263/DZXB.20250172
  中图分类号： TN821+.8;
- 收稿：2025-03-09，
  
  修回：2025-07-07，
  
  纸质出版：2025-07-25
- 稿件说明：
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袁航, 陈付昌, 向凯燃. 一种用于±45°极化十字型偶极子天线阵列的解耦方法[J]. 电子学报, 2025, 53(07): 2453-2460.

YUAN Hang, CHEN Fu-chang, XIANG Kai-ran. A Decoupling Method for ±45°-Polarized Crisscross-Shaped Dipole Antenna Array[J]. Acta Electronica Sinica, 2025, 53(07): 2453-2460.
袁航, 陈付昌, 向凯燃. 一种用于±45°极化十字型偶极子天线阵列的解耦方法[J]. 电子学报, 2025, 53(07): 2453-2460. DOI：10.12263/DZXB.20250172

YUAN Hang, CHEN Fu-chang, XIANG Kai-ran. A Decoupling Method for ±45°-Polarized Crisscross-Shaped Dipole Antenna Array[J]. Acta Electronica Sinica, 2025, 53(07): 2453-2460. DOI：10.12263/DZXB.20250172

摘要

本文研究了一种适用于±45°极化的十字型偶极子天线阵列的解耦方法，主要基于一个共线排布的天线阵列进行讨论，天线在1.7~2.3 GHz的带宽范围内驻波比小于1.5.2个±45°极化共线排布的十字型偶极子天线之间的相互耦合可以分解为3种耦合类型：E面共极化耦合（E耦合）、H面共极化耦合（H耦合）和交叉极化耦合.首先对E面单极化天线阵列进行研究，将天线的辐射臂垂直弯曲一定长度，可以引入一个自解耦零点；接着在2个天线之间引入一根垂直金属枝节，可以调节该自解耦零点的位置.在2个共线水平排布的十字型偶极子天线之间，水平辐射臂末端之间的距离较近，因此E耦合对端口隔离影响较大.当采用弯折辐射臂并引入垂直金属枝节的方法后，可以同时改善2个天线之间的45°端口隔离度和-45°端口隔离度.为了抑制45°端口与-45°端口之间的交叉极化耦合，引入一个额外的U型金属带.通过弯折辐射臂，垂直金属枝节和U型金属带的结合，2个十字型偶极子天线之间的隔离度可以从16 dB提高到25 dB以上.此外，由于在阵列上方无需加载具有较大尺寸和厚度的超材料、介质层、多层超表面等寄生结构，天线阵列的总体剖面和体积没有显著增加.

Abstract

In this paper

a decoupling method for a ±45°-polarized crisscross-shaped dipole antenna array is studied based on a collinear antenna array with a standing wave ratio of less than 1.5 in the bandwidth range of 1.7 GHz to 2.3 GHz. The mutual coupling between two ±45°-polarized collinear crisscross-shaped dipole antennas can be decomposed into three coupling types: E-plane co-polarized coupling (E coupling)

H-plane co-polarized coupling (H coupling) and cross-polarized coupling. Firstly

the E-plane single-polarized antenna array is studied

and a self-decoupling zero can be introduced by bending the antenna’s radiating arm vertically to a certain length. A vertical metal branch is then introduced between the two antennas to adjust the position of the self-decoupling zero. As the distance between the ends of the horizontal radiating arms is relatively close between two collinear horizontally arranged crisscross-shaped dipole antennas

the E coupling has great influence on the port isolation. The 45° port isolation and -45° port isolation between the two antennas can be improved simultaneously by bending the radiating arm and introducing vertical metal branch. To suppress the cross-polarized coupling between the 45° port and the -45° port

an additional U-shaped metal strip is introduced. By bending the radiation arms

combining the vertical metal branches and U-shaped metal bands

the isolation between the two crisscross-shaped dipole antennas can be increased from 16 dB to more than 24 dB. In addition

since parasitic structures such as metamaterials

dielectric layers

and multi-layer metasurfaces with large sizes and thicknesses do not need to be loaded above the array

the overall profile and volume of the antenna array do not increase significantly.

关键词

Keywords

references

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