幅度固定唯相位实现波束控制的功分器设计

针对传统阵列天线设计流程中功分器繁琐的设计过程, 基于满足-3 dB范围为0°~12°, -10 dB波束宽度为65°, 波束覆盖为65°, 中心频率为9.05 GHz的余割平方扩展波束赋形要求, 设计了一种幅度固定唯相位实现波束控制的新型串馈结构Gysel功分器.该功分器幅度为固定值, 此幅度分布满足余割平方赋形阵列天线幅度的分布特征, 在遗传算法计算出理想赋形激励后只需调整该功分器的输出相位值就能实现高拟合度的余割平方扩展波束赋形, 大为减少了传统设计中功分器所需的设计时间.

Gysel power divider with fixed amplitude and phase-only beam control

For tedious design of power divider in traditional array antenna design process, based on the -3 dB beam width in height is from 0° to 12°, -10 dB beam width in height is from 12° to 65°, total height coverage is 65°, the center frequency is 9.05 GHz cosecant squared expanded beam informs requirements, this paper designs a new serially fed structure Gysel power divider with fixed amplitude and phase-only control. This power divider amplitude as a fixed value and only using the phase to control antenna's beamforming. Using genetic algorithm, it can realize accurate beamforming of the cosecant squared expanded beam and use less time to complete the design.