一种超宽带四臂螺旋钻孔雷达天线  

An Ultra-wideband Quadrifilar Helix Borehole Radar Antenna

作　　者：李佳颖 刘建霞[1] 赵珍珍 师振盛 张安学[2] LI Jiaying;LIU Jianxia;ZHAO Zhenzhen;SHI Zhensheng;ZHANG Anxue(College of Electronic Information and Optical Engineering,Taiyuan University of Technology,Taiyuan 030600,China;School of Information and Communications Engineering,Xi’an jiaotong University,Xi’an 710049,China)

机构地区：[1]太原理工大学电子信息与光学工程学院,太原030600 [2]西安交通大学信息与通信工程学院,西安710049

出　　处：《电讯技术》2025年第3期477-483,共7页Telecommunication Engineering

基　　金：国家重点研发计划(2021YFB3900102);山西省基础研究计划青年科学研究项目(20210302124171)。

摘　　要：提出了一种基于电阻加载的超宽带四臂螺旋钻孔雷达天线。该天线在偶极子天线的基础上,采用Wu-King电阻加载方法,即天线沿纵向的电阻值依次增加,减少了天线的末端传输电流,使得天线的输入阻抗更加稳定,有效地提升了天线的带宽。同时,通过在天线臂末端设计螺旋结构,增加了天线臂上电流的流经路径,减小了天线的有效尺寸,并拓宽了低频带宽。该天线的外径为40 mm,总长度为574 mm。天线在90.2~998 MHz内驻波比小于2.5,相对带宽高达166.8%,接收脉冲波形拖尾极小。将天线放在洞穴里进行实际测量,测试结果与仿真结果较吻合。天线整体结构简单,加工方便,重量仅为220.5 g,易于携带测试。因此,该天线可以较好地应用于钻孔雷达系统。An ultra-wideband quadrifilar helix borehole radar antenna based on resistive load is proposed.Developed from the dipole antenna,the antenna adopts the Wu-King resistance loading method to increase the antenna resistance sequentially along the longitudinal direction,which reduces the end transmission current of the antenna and effectively improves the bandwidth of the antenna.Meanwhile,the current flow path on the antenna arm is increased by designing a helical structure at the end of the antenna arm,resulting in the reduction of the antenna size and increase of the bandwidth.The outer diameter of the antenna is 40 mm,and the total length is 574 mm.The voltage wave ratio(VSWR)of the antenna is less than 2.5 in 90.2~998 MHz,the fractional bandwidth is up to 166.8%,and the received pulse waveform has very little trailing.Through the measurement of the fabricated antenna in the cave,there is a fair degree of agreement between the measured and simulated results.The overall structure of the antenna is simple,easy to process and weighs only 220.5 g,making it easy to carry around for testing.Therefore,the designed antenna can be better applied in the borehole radar system.

关 键 词：钻孔雷达 超宽带天线 电阻加载 四臂螺旋 

分 类 号：TN957.2[电子电信—信号与信息处理]