基于液态金属的方向图可重构卫星导航天线
Pattern-Reconfigurable Satellite Receiving Antenna Based on Liquid Metal
白霞 1于硕 1王青敏 1柳扬 1高志伟1
作者信息
- 1. 石家庄铁道大学河北省电磁环境效应与信息处理重点实验室,石家庄 050043
- 折叠
摘要
针对卫星通信在不同方位定向导航能力差的问题,提出了一种基于液态金属的方向图可重构天线.首先,设计了主要辐射单元四臂螺旋天线和圆极化馈电网络,构建了基本的卫星导航天线模型;其次,基于八木天线原理,在天线一定间距等角度设计了 4个接地反射空心柱;再将液态金属注入不同位置的空心柱,优化了反射柱,实现了方向图的反向偏移.仿真结果表明,所设计的天线辐射频段为1.5～1.64 GHz,可在360°覆盖范围内实现5种辐射角度的波束切换,能够在北斗卫星导航系统的B1频段和全球定位系统的L1频段实现高精度、定向导航.
Abstract
A pattern reconfigurable antenna based on liquid metal is proposed to address the problem of poor directional navigation capability of satellite communication in different directions.Firstly,the main radiating element consisting of four arm spiral antenna and circularly polarized feeding network were designed,and a basic model of satellite navigation antenna was constructed.Secondly,based on the Yagi antenna principle,four grounded reflective hollow columns are designed at a certain distance and angle around the antennas.Subsequently,the height of the reflective column injected with the liquid metal is optimized to achieve reverse displacement of the directional pattern.The simulation results show that the designed antenna has a radiation frequency range from 1.5 to 1.64 GHz,which can realize beam switching at five radiation angles within a 360° coverage range.It can achieve high-precision and directional navigation in the B1 frequency band of the Beidou satellite navigation system and the L1 frequency band of the global positioning system.
关键词
波束控制/液态金属/方向图可重构天线/四臂螺旋天线/卫星导航Key words
beam control/liquid metal/pattern reconfigurable antenna/four arm spiral antenna/satellite navigation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据