具有陷波特性的无人船双频段盘锥天线设计

摘要

A dual-band discone antenna was designed for emergency rescue ship unmanned platform. It''s a um?brella ossification transformation of the traditional discone antenna by using matched small coppers which realizes the antenna notch and reduces air resistance. The result indicates that while the antenna frequency band is in emer?gency rescue 350 MHz~370 MHz and 850 MHz~870 MHz,both their VSWR(Voltage Standing Wave Ratio)are less than 1.4,and the omnidirectional radiations are in the horizontal direrction with the maximum gain 4.12 dB and 6.2 dB. The VSWR are almost higher than 1.5 and achieves the notch while in the easily interfering 370 MHz~850 MHz band. So the antenna designed meets the requirements of the emergency rescue unmanned boat platform.%设计了一款适用于应急救援无人船平台的双频段盘锥天线.对传统盘锥天线进行了伞骨化改造并加载了匹配小铜片,实现了天线陷波并减小了风阻.利用HFSS软件对天线进行仿真并实际制作和测量了天线.测量结果表明:天线在应急救援的350 MHz~370 MHz和850 MHz~870 MHz频段上驻波比均小于1.4,辐射方向均为水平全向,增益最高分别达到4.12 dB和6.2 dB.在易产生干扰的370 MHz和850 MHz频段上,驻波基本高于1.5,实现了陷波.所设计的天线满足应急救援无人船平台对天线的要求.