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应用科学学报

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易于有源集成的圆极化微带天线

孙江涛 杨雪霞 盛 洁   

  1. 上海大学 通信与信息工程学院，上海 200072
  • 收稿日期:2007-07-09 修回日期:2007-11-02 出版日期:2008-03-31 发布日期:2008-03-31

Circularly Polarized Microstrip Antenna Easily Integrated with Active IC

SUN Jiang-Tao YANG Xue-Xia SHENG Jie   

  1. School of communications and information engineering, Shanghai University, Shanghai 200072, China
  • Received:2007-07-09 Revised:2007-11-02 Online:2008-03-31 Published:2008-03-31

被引次数

4

摘要： 提出一种新型的圆极化微带天线形式，采用共面波导、不等长十字槽耦合馈电，易于与有源电路集成。利用电磁场仿真软件分析了天线几何参数对天线性能的影响，设计并加工了一个圆极化天线。仿真值与实验结果基本吻合，在10.28GHz工作频率上测得驻波比小于2的带宽达到600MHz，边射方向上的圆极化轴比为1.7dB，轴比小于3dB的带宽为140MHz。实验结果表明,天线具有较好的圆极化性能。

关键词: 微带天线, 圆极化, 共面波导

Abstract: This paper presents a novel unequal cross-slot coupled circularly polarized microstrip antenna excited by coplanar waveguide (CPW), which is convenient to be integrated with active circuits. Influence of the antenna’s size on the characteristics is analyzed using an electromagnetic simulator. A prototype is designed and fabricated. The measured results are in good agreement with simulation. The measured bandwidth of VSWR below 2 reaches 600MHz and axial ratio is 1.7dB in the main direction, with 3dB bandwidth of 140MHz at the central frequency of 10.28GH. Good circular polarization performance has been shown in experiments.

Key words: microstrip antenna, circular polarization, coplanar waveguide(CPW), coupling feed