【作者】 史文慧； 高月辉； 杨雪松；

【Author】 SHI Wen-Hui;YANG Xue-Song;School of Physics, University of Electronic Science and Technology of China;Yangtze Delta Region Institute of University of Electronic Science and Technology of China;

【机构】 电子科技大学物理学院； 电子科技大学长三角研究院(湖州)；

【摘要】 本文提出了一种基于多谐振的宽带双极化天线单元,并采用空间电磁去耦技术进行阵列设计。通过引入新型寄生结构,所设计的双极化天线单元在1.33-2.55 GHz频段(相对带宽57.8%)内达到了30 dB的极化隔离度。在此基础上构建MIMO天线,采用由解耦表面、金属线和金属墙组成的复合去耦结构,以提升单元间隔离性能。两单元MIMO天线的仿真结果表明,天线在1.5-2.5 GHz频段内具有良好的阻抗匹配特性(|S11|<-10 dB),且在0.4λ(λ为1.5 GHz自由空间波长)的紧凑间距下,带内隔离度从9 dB显著提升至17 dB。更多还原

【Abstract】 This paper proposes a broadband dual-polarized antenna element based on multi-resonance and employs spatial electromagnetic decoupling technology for array design. By introducing a novel parasitic structure, the designed dual-polarized antenna element achieves a polarization isolation of 30 dB within the frequency range of 1.33-2.55 GHz(relative bandwidth of 57.8%). On this basis, a MIMO antenna is constructed, utilizing a composite decoupling structure composed of a decoupling surface, metal lines, and metal walls to enhance inter-element isolation performance. Simulation results of the two-element MIMO antenna demonstrate that the antenna exhibits excellent impedance matching characteristics(|S11|<-10 dB) within the frequency range of 1.5-2.5 GHz. Moreover, at a compact spacing of 0.4λ(where λ is the free-space wavelength at 1.5 GHz), the in-band isolation is significantly improved from 9 dB to 17dB.更多还原