一种小型化宽带螺旋天线的数值分析与实验  

Numerical analysis and experiment of a miniaturization ultra-wideband spiral antenna

作　　者：宋朝晖[1] 李红梅[1] 邱景辉[1] 

机构地区：[1]哈尔滨工业大学电子与信息技术研究院,黑龙江哈尔滨150001

出　　处：《电波科学学报》2009年第1期174-178,184,共6页Chinese Journal of Radio Science

基　　金：哈尔滨工业大学基金(HIT2003.02)

摘　　要：提出了一种始端为等角螺旋线、终端为阿基米德螺旋线的复合式小型化螺旋天线,改善了等角螺旋天线的低频特性,克服了阿基米德螺旋天线臂长带来的传输损耗大、效率低的缺点;并设计了一种适合单向辐射的微带线——平行双线宽频带巴伦。计算与测试结果表明:该天线的低频端阻抗特性优于相同尺寸的等角螺旋天线和阿基米德螺旋线天线,具有较好的方向图特性和圆极化特性。An miniaturized antenna structure with an equiangular spiral line at the origin and an Archimedean spiral line at the terminal are proposed in this paper. The characteristic of the equiangular spiral antenna at low frequency is improved, and the shortcomings of the Archimedean spiral antenna, such as the large trans- mission loss and the inefficiency due to the long arms, are overcome. A parallel-line broadband bulun which is suitable for one-direction radiation is also designed by mi- crostrip. The simulation and test results indicate that the impedance characteristics of the proposed antenna at low frequency are better than the equiangular spiral and Archimedean spiral antenna of the same size, and it has better pattern and circular polarization characteristics.

关 键 词：宽带天线小型化 复合式螺旋天线 FDTD 共形网格 宽带巴伦 

分 类 号：TN82[电子电信—信息与通信工程]