共面带状线馈电的圆极化双频微带天线

内容简介：提出一种工作于2.4GHz（圆极化）和5.8GHz（线极化）的双频微带天线,由共面带状线（CPS）馈电。在菱形环中内嵌小方环实现双频工作,菱形环上槽口实现圆极化特性,背面加反射板以提高天线增益。为了实测天线性能和应用于不平衡馈电方式,还设计了CPS至微带线的巴伦。实测结果与仿真结果比较吻合,在2.4GHz与5.8GHz的S11〈-10dB工作带宽分别为33.3%和17.4%,增益分别达到9.05dBi和6.59dBi,2.4GHz频点3dB轴比带宽为15.8%。该天线频带宽、增益高、结构简单、易于集成,可用于无线通信和微波输能系统的整流天线中。

Abstract：A new microstrip antenna fed by a coplanar stripline（CPS） operating at dual-band is proposed,one is circular polarization and the other is linear one operating at 2.4GHz and 5.8GHz respectively.The dual-band operation is realized by a pair of small square loops in the center of the rhombic loops.The circular polarization（CP） is achieved by the slot on the external rhombic loops and the gain is improved by a reflection plane.A CPS to microstrip balun is designed to measure the antenna＇ s performances and be applied in unbalanced feed structure.Experiment results agree with simulated ones.The relative bandwidth of S11 -10dB in 2.4GHz and 5.8GHz are 33.3% and 17.4% respectively.The maximum gain are 9.05dBi at 2.4GHz and 6.59dBi at 5.8GHz respectively.The relative CP bandwidth of axial ratio 3dB at 2.4GHz is 15.8%.The antenna has characteristics of wide bands,high gain,simple structure and easy to be integrated.It can be used in wireless communication systems and rectennas of microwave power transmission system.

作者：周鋆, 杨雪霞, 吕艳青, 江超,

关键词：微带天线, 共面带状线, 双频, 圆极化, 巴伦,