电子学报2025，Vol.53Issue(7)：2453-2460,8.DOI:10.12263/DZXB.20250172
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
摘要
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-polar-ized 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 im-proved 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 di-pole 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
天线阵列/基站天线/解耦/偶极子天线/双极化天线/自解耦Key words
antenna array/base-station antenna/decoupling/dipole antenna/dual-polarized antenna/self-decoupling分类
信息技术与安全科学引用本文复制引用
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(7):2453-2460,8.基金项目
国家自然科学基金(No.62471186) （No.62471186）
广州市科技规划项目(No.2024A04J6306) National Natural Science Foundation of China(No.62471186) （No.2024A04J6306）
Science and Technology Plan-ning Project of Guangzhou City(No.2024A04J6306) （No.2024A04J6306）
