一种具有分形结构和倒 L 形极板的低剖面宽带交叉偶极天线。

A low-profile broadband crossed-dipole antenna with fractal structure and inverted-L plates.

作者信息

Feng Guirong, Qi Tianyi, Li Mingming, Li Jiachen, Wang Xin-Wei, Yang Hai-Long

机构信息

School of Electrical Engineering, Xi'an University of Posts and Telecommunications, Xi'an, 710100, China.

School of Electrical Engineering, Xi'an University of Posts and Telecommunications, Xi'an, 710121, China.

出版信息

Sci Rep. 2022 Sep 2;12(1):14960. doi: 10.1038/s41598-022-18594-x.

DOI:10.1038/s41598-022-18594-x

PMID:36056112

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9440233/

Abstract

A low-profile broadband circularly polarized (CP) crossed-dipole antenna is proposed. In this antenna, the dipole uses a fractal-based structure with multiple similar patches for obtaining broadband CP radiation and impedance matching. The incorporation of the crossed-dipole antenna with four triangular parasitic patches improves both the impedance and axial ratio (AR) bandwidths. Four parasitic coupled inverted-L metal plates are loaded on the ground plane to significantly enhance the AR bandwidth and reduce the antenna profile. The measured results are in agreement with the simulations, which demonstrates that the proposed antenna has a low profile of 0.18 λ, a - 10 dB impedance bandwidth of 91% (2.78-7.42 GHz), a 3 dB AR bandwidth of 81.5% (2.99-7.1 GHz), and a good right hand circular polarization (RHCP) radiation pattern with an average gain of 7.9 dBi over the whole operating band.

摘要

提出了一种低剖面宽带圆极化（CP）交叉偶极子天线。在该天线中，偶极子采用基于分形的结构，带有多个相似贴片，以实现宽带CP辐射和阻抗匹配。交叉偶极子天线与四个三角形寄生贴片相结合，改善了阻抗带宽和轴比（AR）带宽。在接地平面上加载四个寄生耦合倒L形金属板，以显著增强AR带宽并降低天线剖面。测量结果与仿真结果一致，这表明所提出的天线具有0.18λ的低剖面、91%（2.78 - 7.42 GHz）的-10 dB阻抗带宽、81.5%（2.99 - 7.1 GHz）的3 dB AR带宽，以及在整个工作频段平均增益为7.9 dBi的良好右旋圆极化（RHCP）辐射方向图。