一种基于扼流结构的基站天线碗状振子异频去耦方法
A cross-band decoupling method for bowl-shaped dipoles of base station antenna based on choke structure
魏庚明 1王艺磊 1贺怡 1杨林1
作者信息
- 1. 西安电子科技大学 电子工程学院,陕西 西安 710071
- 折叠
摘要
针对双频嵌入式布局的基站天线中存在高频振子辐射性能受低频振子严重干扰的问题,提出一种基于扼流结构的基站天线碗状振子异频去耦方法.设计了含去耦结构的基站天线,在低频振子臂上加载微带形式的扼流结构,通过分析扼流结构的等效电路、在高频天线工作频段的感应电流及单站雷达散射截面(Radar Cross-Section,RCS),调整扼流结构的性能参数,有效降低低频振子对高频振子的影响.通过设计具有去耦功能的双频双极化基站天线阵列,验证所提方法的可行性.结果表明,低频振子具有良好的阻抗匹配特性,所提方法能有效减弱高频振子受低频振子影响导致的交叉极化恶化问题,且能够稳定方向图波束宽度.
Abstract
To address the issue of significant interference from low-frequency dipoles on the radia-tion performance of high-frequency dipoles within dual-band embedded layout base station anten-nas,a cross-band decoupling method based on choke structure for bowl-shaped dipoles of base sta-tion antenna is proposed.A base station antenna with a decoupling structure is designed,incorpora-ting a microstrip choke structure on the arms of the low-frequency dipole.By analyzing the equiva-lent circuit of the choke structure,the induced current at the working frequency band of the high-frequency antenna,and the radar cross-section(RCS),the performance parameters of the choke structure are adjusted to effectively minimize the impact of the low-frequency dipole on the high-fre-quency dipole.To verify the feasibility of the proposed method,the designed dual-band dual-polar-ized base station antenna array with decoupling capability is tested.The results show that the low-frequency dipole has good impedance matching characteristics.The proposed method can effectively mitigate the issue of cross-polarization degradation caused by the influence of the low-frequency di-pole on the high-frequency dipole,and can stabilize the beam-width of the directional pattern.
关键词
基站天线/碗状振子单元/扼流结构/雷达散射截面/异频解耦/嵌入式布局Key words
base station antenna/bowl-shaped dipole element/choke structure/radar cross-section/cross-band decoupling/embedded scheme引用本文复制引用
基金项目
陕西省自然科学基础研究计划(2019JM-587)
出版年
2024
NETL
NSTL
维普
万方数据