星载可移动多馈源单口径多波束天线研究

针对我国通信业务容量提升以及热点区域动态变化的保障能力需求，设计了Ka频段多馈源单口径可移动多波束天线，研究了波束馈源簇形成方式、相邻波束馈源交叠方案、天线转动方式、波束形成网络，以实现覆盖区域的高增益通信和波束灵活调整。通过高增益低旁瓣多波束天线的频率复用设计和波束形成网络技术研究，提升卫星通信系统的容量及天线覆盖的灵活性。重点改善波束扫描后的形状畸变和性能恶化问题，仿真表明，对波束幅相权值的优化可以保证天线转动前后波束增益和C/I性能稳定。

Research on movable mult-feed single aperture multi-beam antenna for space-borne

Aiming the requirement of improving the communication capacity in my country and the dynamic change of the support capability in the hot spot area, this paper designs the Ka band mult-feed single-aperture movable multi-beam antenna, and studies the beam feed cluster formation method, adjacent beam feed overlap scheme, antenna rotation mode, and beam forming network, to achieve high gain communication and flexible beam adjustment in coverage area. Through the frequency reuse design of high-gain low-side lobe multi-beam antenna and the research of beam forming network technology, the capacity of satellite communication systems and the flexibility of antenna coverage are improved. This paper focuses on improving the shape distortion and performance deterioration after beam scanning. The simulation shows that the optimization of the beam amplitude and phase weights can ensure the stability of the beam gain and C/I performance before and after the antenna is rotated.