科研之友
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摘要
The two-way power combiner consisting of two TM01-TE11 serpentine mode converters with a common output has demonstrated high-power capacity and high combination efficiency for two phase-locked relativistic backward wave oscillators (RBWOs). To realize channel power combination for four phase-locked X-band RBWOs, we propose an all circular waveguide four-way power combiner based on the previous two-way power combiner. Four TM01 modes are first combined into two TE11 modes with two TM01-TE11 mode two-way power combiners; then, through two separate 90 degrees bending waveguides and tapered waveguides, the two TE11 modes are combined into one TE11 mode with a TE11-TE11 mode two-way power combiner. Separate calculations show that at 9.22 GHz, the conversion efficiency of the TM01-TE11 mode two-way power combiner is 95.4%, the transmission efficiencies of 90 degrees bending waveguide and tapered waveguides, and the combination efficiency of the TE11-TE11 mode two-way power combiner are close to 100%. Integrated simulations indicate that as four incident ports are fed with TM01 modes with power of 2.5 GW at each port and phase of 0 degrees, 180 degrees, 0 degrees, and 180 degrees, respectively, the total combination efficiency is 94.5%, and the maximum electric field in the four-way power combiner is 774 kV/cm.
- 出版日期2018-7
- 单位西北核技术研究所
