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在电小尺寸锥台上,设计并实现了一款工作于GPS L1频点(1.575GHz)和北斗B1频点(1.562GHz)的锥台共形水平全向圆极化微带天线阵。采用HFSS软件仿真,比较分析了锥台共形对贴片天线阵单元S11、轴比、增益等参数带来的影响,通过对辐射贴片尺寸调整,改善其圆极化性能,提高了圆极化增益。加工实物天线阵样机,测试结果表明,该天线阵在1.556~1.578 GHz频段内S11≤-10d B,在GPS L1频点和北斗B1频点处,水平全向增益最大值分别为2.08d B和1.19d B,增益不圆度小于2d B,实测结果证明该天线具有良好的水平全向圆极化辐射性能。
On the electrical small-size frustum, a cone-conformal horizontal omnidirectional circularly-polarized microstrip antenna array designed and implemented at GPS L1 frequency (1.575GHz) and BeiDou B1 frequency (1.562GHz) is designed and implemented. HFSS simulation was used to analyze the influence of frustoconical conformality on parameters such as S11, axial ratio and gain of patch antenna array element. By adjusting the size of the radiation patch to improve its circular polarization performance, Gain. The experimental results show that the antenna array has S11≤-10d B in the band of 1.556 ~ 1.578 GHz, and the maximum horizontal omnidirectional gain at the frequency of GPS L1 and Beidou B1 are 2.08d B and 1.19d B, the gain of less than 2d B, the measured results show that the antenna has a good horizontal omnidirectional circularly polarized radiation performance.