某卫星有源相控阵天线为首颗成功在轨应用的C 频段多极化天线,已在轨运行超过4 年,采用有源相控阵天线体制,具有高分辨率、宽覆盖、多极化、多工作模式、高图像质量的特点,波束控制灵活,能够实现聚束模式、超精细条带模式、全极化条带模式、波成像模式、双极化条带模式、双极化扫描模式多种工作模式。相控阵天线的部件失效会造成天线增益、副瓣电平等性能参数的恶化。通过算例仿真,建立部件失效数学模型,天线增益变化与失效比例相关,副瓣抬升和失效模式相关。计算结果可以用于某卫星有源相控阵天线在轨失效后性能分析。

The active phased array antenna of a satellite is the first C-band multi-polarization antenna applied in orbit, which has been in orbit for more than 4 years. The active phased array antenna system is adopted, it has the characteristics of high resolution, wide coverage, multi-polarization, multiple working modes, and high image quality. It has flexible beam control, capable of achieving various working modes such as bunching mode, ultra fine stripe mode, fully polarized stripe mode, wave imaging mode, dual polarized stripe mode, and dual polarized scanning mode, it can realizes various working modes. Component failure of phased array antenna will lead to deterioration of antenna gain, sidelobe level and other performance parameters. Through simulation, mathematical models of component failure are established. The antenna gain change is related to failure ratio, and sidelobe lift is related to failure mode. The calculated results can be used to analyze the performance of active phased array antenna of the satellite after on-orbit failure.

TN982