隐蔽式车载短波天线设计

Investigation of a Vehicular Concealed HF Antenna

设计了一款新型隐蔽式车载短波天线,采用加载的鞭状天线,安装于车体的内部,工作频段为2~30 MHz。安装于内部的天线性能受金属车体影响大,采用对车顶进行适当改装的方法缓解了这个问题。仿真与1/10缩比模型实物测试显示,天线具有良好的隐蔽、低剖面及全向辐射特性,高度仅为0.013λ。此外还设计制作了宽带匹配网络,匹配后全频段的驻波比小于3.5。最后建立了短波传播链路模型,对天线的通信效果进行了理论分析。目前针对安装于车体内部的隐蔽短波天线暂无其它研究成果,设计的天线在车载短波通信系统中有广阔的应用前景。

A novel vehicular concealed HF antenna is proposed.It uses a loaded whip antenna and is installed inside the vehicle.Its working froquency band is 2~30 MHz.The performance of the internal antenna is greatly affected by the metal body of the car,which is alleviated by the appropriate roof modification.Simulation and 1/10 scaling fabrication validates the performance of proposed antenna,which possesses excellent concealment,low profile and omnidirectional radiation characteristics.The antenna has a profile of 0.013λ.Additionally,wideband matching network is designed to ensure VSWR lower than 3.5.The communication capability of proposed antenna is analyzed theoretically through modeling HF electromagnetic wave propagation link.There are no other research achievements of vehicular concealed antenna at present.The proposed antenna has a great application prospect in the vehicular HF communication system.