| 摘要: |
| 极化面调整是船载卫通站天线跟踪线极化卫星实现极化匹配必备的基本功能，而船载卫通站穿越赤道后极化面需反转180°，传统的设计会由此引起通信中断。通过对赤道附近区域设备工作状态与位置特点的分析，从扩大极化面机械转动范围与优化极化控制程序两方面进行改进，利用天线馈源中波导的轴对称性，有效推迟了穿越赤道后极化面反转的时机。理论计算与实际应用测试表明，对于某船常用的航线与卫星，改进后的系统可将穿越赤道后极化面反转的时机推迟6.8 h以上，有效解决了卫通站穿越赤道时出现的通信中断问题。 |
| 关键词: 卫星通信 赤道 通信中断 天线馈源 极化面控制 |
| DOI： |
|
| 基金项目: |
|
| Improved design of antenna polarization plane control for shipborne satcom earth station |
| LIN Xiliang,ZHOU Jinbiao,LI Kang,ZHAO Qianhong |
| () |
| Abstract: |
| Adjustment of polarization plane is a necessary basic function of antenna on shipborne satellite communication(satcom) earth station to track linear polarization satellite．When the shipborne satcom earth station goes across the equator，the polarization plane in traditional design will rotate backward 180°，which will cause communication interrupt．By analyzing the equipment working status and position features near the equator，this paper proposes an improved design to solve the problem above from two aspects，enlarging mechanical rotation range of polarization plane and optimizing polarization control program，which takes advantage of the axial symmetry features of waveguide in antenna feed and delays the reversing time of polarization plane when going across the equator effectively．Theoretical calculation and practical application test imply that the reversing time of polarization plane can be delayed more than 6.8 hours when going across the equator along the common route of a ship. The improved design can solve the communication interrupt problem effectively when ship borne satcom earth station goes across the equator. |
| Key words: satellite communication equator communication interrupt antenna feed polarization |
