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输入输出共轴的三弯曲型TM01-TE11模式转换器
Tri-bend TM01-TE11 mode converter with input-output aligned on the same axis
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摘要: 通过采用相位重匹配技术,设计了一种输入输出共轴的三弯曲型TM01-TE-11模式转换器,该转换器由三段常曲率弯曲波导和两段直波导组成.用模式耦合理论建立了该类模式转换器的数值计算和优化设计方法，并设计了一个中心频率为7.0 GHz的模式转换器.该转换器的TM01-TE11转换效率在中心频率上大于99％,在6.5～7.5 GHz的频率范围内大于90％.应用时域有限差分法和有限元方法对所设计的模式转换器进行了仿真,仿真结果验证了设计理论和设计结果.Abstract: A serpentine TM01-TE11 mode converter with input and output ports aligned on the same axis was designed by adopting phase rematch technique. The converter is formed with three constant-curvature bent waveguides and two straight waveguides. Numerical investigations on this mode converter were presented with a general optimizing code employing coupled mode theory. A mode converter of this kind centered at 7.0 GHz was designed. The efficiency of the conversion from TM01 to TE11 exceeds 99% at 7.0 GHz and 90% over the frequency range of 6.5 to 7.5 GHz. Simulations with FDTD and FEM methods verified the theoretical designing results respectively.
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