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针对海上石油钻井平台地理环境对通信天线的特殊要求,提出了一种宽频带圆极化平面天线,该天线适用于新一代Ka频段海事卫星终端。天线采用基于微扰法的矩形贴片作为辐射单元,对微扰槽位置等参数利用矩量法进行了优化,并采用耦合馈电方式来提高天线的圆极化带宽。仿真结果表明,该天线具有良好的阻抗及轴比带宽,分析了天线的辐射特性,并对比了不同的仿真结果。该天线具有结构紧凑,馈电简单、圆极化特性好、易于制作等优点。
Aiming at the special requirements of the communication antenna for the geographical environment of offshore oil drilling platform, a wideband circularly polarized planar antenna is proposed. The antenna is suitable for a new generation of Ka satellite maritime satellite terminals. The antenna uses the rectangular patch based on the perturbation method as the radiating element. The parameters such as the position of the perturbation slot are optimized by the method of moment, and the circular polarization bandwidth of the antenna is improved by using the coupled feeding method. The simulation results show that the antenna has good impedance and axial ratio bandwidth, and the radiation characteristics of the antenna are analyzed. Different simulation results are compared. The antenna has the advantages of compact structure, simple feeding, good circular polarization characteristics and easy manufacture.