一种S 波段印刷四臂螺旋天线的分析与设计

本文主要分析了一种S 波段的印刷四臂螺旋天线。并设计了一宽波束右旋圆极化介质加载的印刷四臂螺旋天线， 馈电网络采用的是具有两级隔离电阻的威尔金森功分器。该天线的仿真结果与实测结果吻合良好。仿真和实物测试结果表 明，该天线在3.05GHz-3.45GHz 工作频率范围内，具有较好的心形方向图、3dB 波瓣宽度达到160°、全方位角的增益大于 -2dB，轴比小于5dB，驻波比小于1.4。通过机电一体化设计，该四臂螺旋天线具有良好的电气性能，成本低。

Analysis and Design of A S-band Printed Quadrifilar Helical Antenna

It was mainly analysed a S-band printed quadrifilar helical antenna in this paper. And a medium loading wide beam right-hand circularly polarized printed quadrifilar helical antenna was designed.The Wilkinson power divider with two levels isolating resistor was adopted in this feed network. The simulation results of this antenna fit well with the measured results.According to the simulation results and measured results,the antenna had a good heart-shaped antenna pattern from from 3.05GHz to 3.45GHz,the half power-width was more than 160°,the gain was greater than -2dB in the azimuth range, the axial ratio was lower than 5dB, and the VSWR was lower than 1.4.Through the design of electromechanical integration,this quadrifilar helical antenna had good Electrical characteristics,and low cost.