摘要
该文提出用馈电校正的方法来改善圆极化天线的轴比性能。通过增加附加并联枝节改变双馈电点处信号幅度和相位的相对分布,抵消高次模辐射和馈电网络寄生辐射的影响,将高次模辐射和寄生辐射都考虑在内,来实现馈电校正。在X波段采用全波一体化优化方法设计出双馈点宽带圆极化微带天线。该文给出了仿真结果及实测数据。获得的实测结果为:中心频率为10GHz,电压驻波比小于2的带宽为33.85%,圆极化轴比小于3dB的带宽为22.4%。与校正前的结果相比,轴比带宽从16.2%提高到22.4%。
This paper presents a feeding correction method to improve the performance of the circular antenna. This method is realized by adding simple tuning stubs to change the relative distributions of magnitudes and phases at two feeding points and to compensate the effects of radiation from higher-order modes and feeding network. The full wave integrated method is used in the optimization. A wideband circularly polarized patch antenna is designed, manufactured and tested in the X band. The experimental results show that the frequency bandwidth is 22.4% for a 3-dB axial ratio criterion and is 33.85% for a VSWR 〈2 criterion at the central frequency 10 GHz. Compared with the results before correction, the bandwidth of the axial ratio increases from 16.2% to 22.4%.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2007年第1期114-117,共4页
Journal of Nanjing University of Science and Technology
基金
国防重点实验室资助项目
关键词
微带天线
圆极化
双馈点
优化设计
microstrip antenna
circular polarization
dual feed
optimization design
