船载北斗多面化、可控式四臂螺旋天线阵列性能调控机理研究

船载北斗天线性能是直接影响北斗系统定位精度的关键因素之一，但天线小型化需求、导航频段少、低仰角性能难以根据海况与船舶动态参量来调控等问题亟待解决。本项目针对上述问题，在已研究获得的单一四臂螺旋天线阵元性能优化算法的基础上，构建多面化、可控式四臂螺旋天线阵列模型，结合矩量法理论算法、基于有限元算法的HFSS、基于时域有限积分算法的CST和实验，重点研究不同参量与天线阵列模型尺寸、频带、方向图的关联性，得到天线阵列性能调控机理。利用大量近海、远海定位测试实验数据对调控机理进行验证，并结合调控机理，研究不同海况、不同船舶六自由度动态参量下，天线阵列性能的优化方法。为实现船载北斗系统高精度定位、提高智能船舶定位导航能力，提供天线方面的理论依据。

The property of ship's Beidou antenna is one of the key factors that affect the positioning precision. But the problems like the small requirement, few navigation bands and low elevation regulation on the basis of the sea conditions and ship's dynamic parameters t need to be solved. We have grasped the optimization algorithms of a quadrifilar helix antenna's arrays performance. On such a basis, has the idea of building multifaceted, controllable quadrifilar helix antenna arrays been raised. Method of moment, HFSS based on finite element, CST based on finite integration and experiments are employed in research, the next focus of study is how parameters connect with the size, band and pattern of multifaceted and controllable array model. The regulating and controlling theory of array pattern will be introduced. The offshore and inshore positioning data will be used to verify the mechanism. More attention will be paid on the array pattern optimization under the dynamic parameters like different sea conditions and ship’s six degrees of freedom. In doing so, we can provide theoretical base of antenna in realizing high positioning accuracy of ship borne Beidou System, and improving abilities of positioning and navigation of intelligent ships.