适用于海事卫星通信的螺旋天线阵设计

Helix antenna designed for maritime satellite communication

为实现船只与Inmarsat(国际海事卫星组织)卫星的实时通信,在使用DSP模块控制天线角度的基础上,采用轴向尺寸最小的三元螺旋天线阵结合带状线结构馈电网络的形式满足对天线极化、增益和方向性的要求,实现天线对目标卫星的实时跟踪.HFSS仿真结果表明,增益达到14 dB,3 dB波瓣宽度为49°,轴比在轴向46°范围内小于3 dB.

Ternary helix antenna array combing with stripline feeding network which is shortest in axial direction was used to achieve communication between the satellites of Inmarsat and ships.DSP module was used to control the direction of the an- tenna.Simulation based on HFSS show that the gain of the an- tenna achieve 14 dB,3 dB beam width is 49°,and the axial ratio is below 3 dB during 46°in the axial direction.The result indi- cates that the antenna structure can meet requirements of the polarization,gain and directivity of the antenna,and the anten- na can track satellites in real time.