一种串联馈电的圆极化菱形天线  

Design of a Series-Fed Dual Rhombic-loop Circularly Polarized Antenna

作　　者：王亮[1] 

机构地区：[1]西安电子科技大学天线与微波技术国家重点实验室,西安710071

出　　处：《测控与通信》2013年第2期4-7,共4页

摘　　要：采用双菱形天线辐射圆极化波，在环内加寄生贴片来增加带宽，引入巴伦进行阻抗匹配，将天线放入短背射中来提高增益。经过优化，最终采用串联馈电方式得到了较好的天线性能：轴比小于3dB的圆极化带宽达40％，驻波小于2的阻抗带宽为39．3％，最大点增益可达13．4dBi。A dual rhombic-loop antenna is used to radiate circularly polarized waves. The bandwidth of circular polarization can be significantly increased when one more parasitic loop is added inside the original loop while good impedance matching is obtained by introducing a balun. The gain is increased with the help of a short backfire antenna. The series feed is used to obtain a good performance by adjusting the size of antenna. The bandwidth is 40% for axial ratio〈3 dB and the impedance bandwidth is 39.3% for VSWR〈2 with an antenna gain of 13.4dBi.

关 键 词：宽频带 圆极化 高增益 环天线 短背射 串联馈电 

分 类 号：TN823[电子电信—信息与通信工程]