摘要
针对圆极化反射阵圆极化带宽窄的问题,结合微带天线的谐振特性和线极化反射阵展宽带宽的思想,提出了一种"工-环"形多谐振宽带网极化反射阵单元,通过研究单元的电流分布对其实现宽带圆极化的原理进行了分析。采用改变单元旋转角度的方法设计了一副169个"工-环"形单元、中心频率为10GHz的右旋圆极化反射阵,并对其进行了测试:3dB轴比带宽达到41%(8.1GHz-12.2GHz),天线效率最高达59.94%(9.9GHz)。实测结果与仿真结果一致,实现了反射阵天线的宽带网极化和高效率。
For the CP reflectarray＇s problem of narrow bandwith, this paper combines the resonant characteristic of the mierostrip antenna and linearly polarized refleetarray＇s idea of improving the bandwith, we present a new multi-resonant ＂工- ring＂ shaped broadband CP refleetarray element, the unit＇s broadband CP principle is analyzed by the current distribution of the element. A 169-element CP refleetarray using element rotation technique has been designed and measured： 3dB axial ra- tio bandwith is over 41% （8.1GHz-12.2GHz）, The best efficiency of 59.94% and the gain of 24.91 dB occur at 9.9 GHz. Measured results are agreed with the simulation results. We get broadband CP and high efficiency.
出处
《微波学报》
CSCD
北大核心
2013年第1期84-87,共4页
Journal of Microwaves
关键词
反射阵
宽带圆极化
微带单元
多谐振
reflectarray, broadband CP, microstrip element, multi-resonant
