一种介质埋藏异形微带八木天线的设计

The design of dielectric embedded special-shaped microstrip Yagi antenna

为达到某重点项目性能要求,综合运用微带天线、八木天线和介质埋藏天线理论及设计方法,设计出了一种介质埋藏异形微带八木天线.该天线将传统八木天线的引向振子由一个改变为两个,形成"$"形,用来规划波束方向和形成双波束;在天线贴片两旁增加"栅栏",聚集了电磁波的辐射,提高了天线增益,同时还获得了较大的相对阻抗带宽.测试表明:在Ku频段的一中心频率上,其绝对带宽为1.9 GHz,最大增益为3.92 dB;在E面具有两个主波瓣,θ=15°处波瓣宽度为11°,θ=347°处波瓣宽度为10°.所设计天线在性能和功能上均满足项目需求,对该项目中信号的接收和发射起到了关键作用.此外,该天线在其他通信、侦察和干扰等场合也具有广阔的应用价值.

In order to meet the performance requirements of a key project,the theory and design method of microstrip antennas,Yagi antennas and dielectric embedded antennas were used comprehensively to design dielectric embedded special-shaped microstrip Yagi antennas.This antenna changes the leading vibrator of the traditional Yagi antenna from one to two,forming a"$"shape,which is used to plan the beam direction and form a dual-beam;adding"fences"on both sides of the antenna patch to gather electromagnetic wave radiation.The antenna gain is improved,and a larger relative impedance bandwidth is also obtained.Tests show that at a center frequency in the Ku band,its absolute bandwidth is 1.9 GHz and its maximum gain is 3.92 dB.There are two main lobes on the E plane:atθ=15°,the lobe width is 11°;atθ=347°,the lobe width is 10°,which shows that the antenna meets the project requirements in performance and function,and plays a key role in the reception and transmission of signals in the project.In addition,the antenna also has broad application value in other communication,reconnaissance and interference situations.