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全球卫星导航系统(GNSS)因其覆盖范围广、通信容量大、传输质量好等优点,在航空、航海、测绘、授时及信息服务等领域发挥了至关重要的作用.天线作为卫星导航系统的必不可缺的一部分,其性能的好坏将对整个导航定位系统产生重大影响.本文采用层叠贴片并结合调谐枝节技术,设计了多模GNSS圆极化天线.通过在上层方形贴片上插入长度不同的枝节,实现了GNSS高频段的圆极化,并且在下层方形贴片插入枝节来满足GNSS低频点的右旋圆极化工作模式.理论分析和仿真结果证明所提出的多模圆极化天线可满足卫星导航终端用户机的多系统定位需求.
Because of its wide coverage, large communication capacity and good transmission quality, GNSS plays a crucial role in the field of aviation, navigation, mapping, timing and information services, etc. As the satellite navigation system An integral part of its performance will have a significant impact on the entire navigation and positioning system.In this paper, the use of laminated patches combined with tuned branches technology, designed multi-mode GNSS circularly polarized antenna through the upper square patch inserted Length of different branches, to achieve the high-frequency GNSS circular polarization, and the lower square patch inserted in the lower section to meet the GNSS low-frequency point of right-handed circular polarization mode of operation.The theoretical analysis and simulation results show that the proposed multi-mode circular The antenna can meet the multi-system positioning needs of satellite navigation terminal users.