通过理论研究以及高频仿真相结合的方法分析设计了一款新型Ka波段8路径向波导空间功率分配(合成)器。研发的新结构输入输出段为标准矩形波导结构,代替了传统功率分配(合成)器输入输出段的同轴结构,这种新型全金属结构更加简单紧凑,更易于加工。仿真结果表明: 功率分配(合成)器工作带宽达到了34%(12 GHz),基本覆盖整个Ka波段;全频带内反射系数S11低于-20 dB,各支路的相位差均小于5°。通过在同轴波导渐变段引入切比雪夫渐变结构,在减小了器件尺寸的同时,在整个频带内的网络S参数也不错。这款新型Ka波段8路径向波导功率分配(合成)器将应用于前级固态功率放大器,推动回旋行波管项目研发。

A novel 8-way Ka band radial waveguide spatial power divider/combiner is analyzed and designed through the combination of theoretical research and high frequency electromagnetic field simulation. Compared with traditional coaxial structure, this new design uses a standard rectangular waveguide as the input and output structure. This all metal structure is much simpler, compacter and easier to manufacture. Simulation results show that the relative bandwidth of this device is 34%(the absolute bandwidth is 12 GHz), which nearly covers the whole Ka band, and S11 in the whole working bandwidth is below -20 dB;and that the phase difference of each way is under 5°. Using the new Chebyshev transition in the coaxial transition decreases the size of the device, and keeps a good S-parameter in bandwidth. This novel eight-way Ka band radial waveguide spatial power divider/combiner can to be applied to pre-stage solid state power amplifiers and promote the gyro-TWT development.