应用于海事卫星通信的低剖面变升角螺旋天线设计  

Design of low profile and variable pitch angle helical antenna for maritime satellite communications

作　　者：傅世强[1] 周月[1] 房少军[1] 曹媛[1] 

机构地区：[1]大连海事大学信息科学技术学院,辽宁大连116026

出　　处：《电波科学学报》2013年第1期63-67,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61071044);交通运输部交通应用基础研究项目(2010-329-225-030);中央高校基本科研业务费专项(2011QN026);辽宁省教育厅一般项目(L2012171)资助

摘　　要：为了满足"动中通"海事卫星通信终端对天线的需求,提出了一种低剖面、变升角螺旋天线的设计方案.天线主体采用铜箔材料制作,利用泡沫塑料支撑,在限定天线高度的情况下,通过改变升角提升天线的圆极化辐射性能;通过调节微带匹配段改善天线的输入阻抗匹配.给出了天线的设计思路,通过大量的电磁仿真计算,最终确定了天线的最优结构,并进行了实物加工和测量.实测结果表明,在海事卫星通信工作频带内,驻波比小于1.12,增益高于9dBi,轴比小于3dB,实测结果与仿真结果具有较好的一致性.该天线具有重量轻、剖面低、易于调谐的特点,为"动中通"海事卫星通信终端天线阵提供了一种新颖的单元天线结构.In order to meet the demand of Satcom-on-the-move （SOTM） antennas for maritime satellite communication terminals, the design of low profile and varia- ble pitch angle of helical antenna is proposed in this paper. The proposed antenna is made of copper foil supported by foam. Under the circumstance of a given antenna height, the performance of circular polarization of the antenna is enhanced by chan- ging the pitch angle and the input impedance matching is improved by adjusting the microstrip stub. The design method of the antenna is given, and the optimal anten- na structure is obtained after a large of electromagnetic simulations. The designed antenna is fabricated and measured. The measured results show that in the whole maritime satellite communication work band the VSWR is less than 1.12, its anten- na gain is higher than 9dBi, and the axial ratio is lower than 3dB. The experimental results have a good agreement with the simulations. The antenna has the character- istics of light weight, low pro-file and easy tuning. It provides a novel antenna elementstructure for SOTM antenna array in maritime satellite communication applications.

关 键 词：海事卫星通信 低剖面 变升角 螺旋天线 

分 类 号：TN823.31[电子电信—信息与通信工程]