S波段宽波束圆极化天线设计

随着现代无线通信系统的发展，对天线也提出了一些特定的更高的要求。设计了一种S频段宽波束圆极化微带天线，以满足系统对天线宽波束辐射的要求；在天线的辐射贴片上附加寄生贴片以展宽天线带宽，并利用金属化过孔以实现单边短路，达到天线小型化设计的目的；利用旋转结构结合多点馈电技术以获得微带天线宽波束圆极化辐射。通过理论分析并利用三维电磁仿真软件HFSS对天线进行了仿真设计和实验，仿真结果与测试结果吻合良好。

Design of an S-band wide beam circular polarized antenna

With the development of modern wireless communication system, some specific higher requirements on the antenna are put forward. In order to meet the system requirements for wide beam radiation, an S-band wide beam circular polarized antenna is proposed. Additional parasitic patches are added on the radiation patch antenna in broadening the bandwidth of the antenna. And the metalized via is adopted to achieve unilateral short circuit. The purpose of miniaturization of the antenna design is therefore achieved. The sequential rotation method combined with multi-point feeding technology is utilized to obtain a broad band microstrip antenna wide beam circular polarized radiation. The structure parameters of antenna are designed according to theoretical analysis and High Frequency Structure Simulator(HFSS) software. The simulation results are in good agreement with the test results.