辐射叶加载的短波宽带鞭状天线优化设计

Optimization design of short wave broadband whip antenna loaded with radiation lobes

提出一款具有多层辐射叶结构的新型鞭状天线,在10 m鞭状天线体上设置不同的辐射叶层数、半径、长度、分支数、仰角及其分布情况,研究其对天线辐射性能的影响,综合考虑选择一套最合适的辐射叶结构,并为天线进行双加载和宽带匹配网络的算法优化。仿真结果表明,与现有的普通宽带鞭状天线相比,增益和效率得到了普遍提高,在低频段增益最高提高了3 dB,效率最高提高了5%;在高频段增益最高提高了5 dB,效率最高提高了35%,方向图上翘也得到了一定的抑制,为改善现有的宽带鞭状天线提供一种新的结构设计方法。

A new type of whip antenna with multilayer radiation lobes structure was introduced.By setting up different numbers in parameters like radiation lobe layer number,radius,length,branch number,elevation angle and distribution of radiation lobe on the body of the 10 meters whip antenna,the research of their influences on antenna radiation performance were launched to choose the most suitable structure for whip antenna.The double loading and the broadband matching network for the antenna were designed and optimized,whose simulation results show that the gain and efficiency,compared with the existing broadband whip antenna,are greatly improved,the maximum growth of gain and efficiency are 3 dB and 5%covering the low frequency,which are 5 dB and 35%covering the high frequency,the warping of the pattern is also restrained to a certain extent,so a new structural design method is provided here to improve the existing broadband whip antenna.