新颖的超宽带平面等角螺旋天线的设计

一种新颖的超宽带平面等角螺旋天线的设计

内容简介：分析了平面螺旋天线的研究方法，并设计了工作于2～12 GHz 的新颖的超宽带平面等角螺旋天线，由天线的宽带特性指标和平衡结构特性，天线两臂的辐射部分设计了一种带环状贴片的天线辐射结构，使圆极化轴比带内小于3 dB，天线馈电部分设计了一种阻抗为指数渐变和梯形渐变相结合的双线形式微带线宽带巴伦，并可采用50 W 同轴探针馈电，使带内反射系数小于-10 dB。测试结果表明，馈电的微带巴伦和天线带环状的结构形式都表现出良好的宽频带和圆极化特性。

Abstract： The planar spiral antenna research methods are analyzed, and the planar equiangular spiral antenna working in 2~12 GHz novel ultra-wideband is designed. For the balanced structure and broadband characteristics of the antenna, a belt-ring stickers antenna radiating structure for the antenna radiation part is designed, so that the circular polarization axis is less than 3dB than the band, while a two-form microstrip line broadband balun combining the impedance index gradient and trapezoidal grodient is designed for the antenna feed part, and 50 W coaxial probe feed may also be adopted, so that the reflection coefficient could be less than -10dB band. The measurement results indicate that both the antenna and the balun exhibit good circular polarization and broad-band property.

作者：罗旺,

关键词：宽带巴伦, 平面等角螺旋天线, 圆极化轴比, 反射系数,