摘要
基于团队前期研究,建立天线在闪电通道附近的电磁耦合模型,详细分析所设计的n79频段(4.8~4.9 GHz)微带天线在不同极化状态下与闪电之间的电磁耦合特征。结果表明:天线为垂直极化状态时,其电场与闪电通道附近电场极化匹配,天线后端感应电压峰值便会大于同一时刻下的圆极化状态下的感应电压峰值。天线在不同极化状态下与闪电通道的耦合电压与其极化偏转角度有关,当天线表面电流的主要方向与闪电通道电场极化方向平行时,天线后端感应电压达到最大,而当天线表面电流的主要方向与闪电通道垂直时,天线后端的感应峰值电压最小。并提出一种基于天线极化可重构的防雷新方法。
In this paper,based on the lightning return stroke electromagnetic model,the lightning channel-communication tower-antenna model is established.The electromagnetic coupling characteristics between the n79 band(4.8-4.9 GHz) microstrip antenna designed in this paper and lightning in different pofarization states are analyzed in detail.When the antenna is in linear polarization state,the polarization state of its electric field matches that of the electric field near the lightning channel,the peak value of the coupling voltage at the back end of the antenna will be greater than the peak value of the coupling voltage in the circular polarization state at the same time.The coupling voftage of the antenna with the lightning channel in different polarization states is related to its pofarization deflection angle,when the main direction of the current on the antenna surface is parallel to the lightning channel,the induced voltage at the back end of the antenna reaches the maximum.When the main direction of the surface current of the antenna is perpendicular to the lightning channel,the induced peak voltage at the back end of the antenna is the smallest.Based on this,a new method of lightning protection based on antenna polarization reconfigurable is proposed.
作者
倪鹏程
刘昆
杜雨洺
孙筱枫
董志诚
NI Pengcheng;LIU Kun;DU Yuming;SUN Xiaofeng;DONG Zhicheng(College of Electronic Engineering,Chengdu University of Information Technology,Chengdu 610225,China;College of Information Science and Technology,Tibet University,Lasa 850000,China)
出处
《成都信息工程大学学报》
2022年第3期270-275,共6页
Journal of Chengdu University of Information Technology
基金
四川省科技计划资助项目(2021YFG0355)。
