摘要
为研究当无线基站通信塔上避雷针遭受雷击时位于闪电通道附近天线的耦合效应,基于CST Studio Suite电磁仿真软件建立闪电通道-通信塔和工作在中国移动通信GSM1800/1900频段下的微带阵列天线的仿真模型。基于闪电回击电磁模型的继后回击过程,研究从天线极化方向讨论天线的雷击耦合特性以及天线单元连接由不同功分器构成的馈电网络进行组阵时阵列天线的雷击耦合特性。发现天线的耦合电压峰值与极化旋转角呈现线性关系,天线在垂直极化下的耦合电压比在水平极化下的耦合电压大得多;同时,对于通信塔上GSM频段的微带阵列天线,阵列天线的耦合电压受到馈电网络的影响,采用由威尔金森功分器构成的馈电网络进行组阵比采用由T型功分器构成的馈电网络进行组阵阵列天线的耦合电压更小。
To study the coupling effect of the antenna located near the lightning channel when the lightning rod on the communication tower of the wireless base station suffers a lightning strike,this paper established a simulation model of the lightning channel-communication tower and the microstrip array antenna working in the GSM1800/1900 frequency band of the China Mobile Communications based on the electromagnetic simulation software of CST Studio Suite.The fol-lowing two aspects are investigated based on the relay striking process of the electromagnetic model of lightning strike back:first,the lightning strike coupling characteristics of the antenna in the direction of antenna polarization;second,the lightning strike coupling characteristics of the antenna when the array antenna is connected to the feed network con-sisting of different power dividers for group array.It is found that the coupling voltage of the antenna under vertical po-larization is much larger than that under horizontal polarization.At the same time,for the microstrip array antenna in the GSM band on the communication tower,the coupling voltage of the array antenna must be influenced by the feed net-work.The coupling voltage of the array antenna formed by the power feeding network consisting of the Wilkinson power divider is smaller than that of the array antenna formed by the T-type power divider.
作者
张圆元
刘昆
杜雨洺
孙筱枫
董志诚
ZHANG Yuanyuan;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,Xizang University,Lasa 850000,China)
出处
《成都信息工程大学学报》
2025年第4期434-440,共7页
Journal of Chengdu University of Information Technology
关键词
微带阵列天线
馈电网络
继后回击
雷击耦合效应
microstrip array antenna
power feeding network
subsequent return stroke
lightning coupling effect
