| 摘要: |
| 基于新馈电结构，设计了一款覆盖全球四大卫星导航系统的双频宽带贴片天线。采用了一种四分八馈电线路，以8个同轴馈电探针两两相连的方式将两路天线馈电信号合为一路，有效简化了馈电网络的复杂性，同时保证了天线辐射的增益、带宽和轴比性能。该双频辐射贴片单元采用正八边形层叠式结构设计，并在每个天线单元边缘对称添加两组矩形调谐单元，有效增加了天线辐射的波束带宽。该双频天线单元在高频1.482~1.617 GHz（波束带宽155 MHz）和低频1.191~1.252 GHz(波束带宽61 MHz）频段范围内，都能保证良好的辐射增益;高低频的3 dB轴比带宽为-130°~130°，具备良好的圆极化性能。经实物样机对比测试分析，实测结果与仿真结果基本吻合。 |
| 关键词: 导航天线 双频宽带天线 四分八馈馈电线路 正八边形贴片天线 圆极化天线 |
| DOI： |
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| 基金项目:广州市科技创新项目（15ZK0412） |
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| Design of a dual-frequency broadband navigation antenna based on new feeding structure |
| LIU Mingjian,LIN Fumin,XIAO Yujie |
| (School of Physics&Optoelectronic Engineering,Guangdong University of Technology,Guangzhou 510006,China) |
| Abstract: |
| Based on the new feed structure,a dual-frequency broadband patch antenna covering the world's four major satellite navigation systems is designed.The design of a four-eight feed line,using the eight coaxial feed probes connected two feeding signals,effectively simplifies the complexity of the feeder network.Simultaneously,it ensures the gain of the antenna radiation,bandwidth and shaft performance.The dual-frequency radiation patch unit adopts the octagonal laminated structure design,and two sets of rectangular tuning unit are placed in each antenna element symmetry.In this way,the antenna radiation beam bandwidth is increased effectively.The dual-frequency antenna unit can guarantee good radiation gain in 1.482~1.617 GHz(beam bandwidth 155 MHz) high frequency and 1.191~1.252 GHz(beam bandwidth 61 MHz) low frequency.The 3 dB axis ratio in high and low frequency is -130°~130°,with sensational circular polarization performance.The measured results are in good agreement with the simulation ones. |
| Key words: navigation antenna dual-frequency broadband antenna four - eight feed line octagonal patch antenna circular polarized antenna |
