高功率毫米波圆波导半径微扰模式变换器的优化设计
Design of high-power millimeter wave corrugated circular waveguide mode converter
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摘要: 从半径渐变波导的耦合波方程出发，利用龙格-库塔法进行优化数值迭代，得到在3 mm波段，TE03-TE02, TE02-TE01高效率模式变换器的设计参数。通过优化程序，设计出了6周期TE03-TE02和3周期TE02-TE01模式变换器优化尺寸。利用CST微波工作室电磁仿真软件对结构尺寸进行优化仿真，仿真结果与优化程序计算结果基本一致。以此数据设计中心频率94 GHz的TE03-TE02，TE02-TE01模式变换器功率转换效率可以达到98.5%以上，90%功率转换的绝对带宽分别达到3.5和7.0 GHz以上，优于设计要求。Abstract: Based on the general coupled wave equations in corrugated circular waveguide with trapered radius, this paper presents the numerical optimization method Runge-Kutta to get the design parameters of 3 mm TE03-TE02 and TE02-TE01 high efficiency mode converter. The optimized structure and computational results are obtained by optimized programme. Simulation results of the structure by CST microwave studio are in excellent agreement with the numerical computed values. The center frequency of TE03-TE02 and TE02-TE01 mode converter is 94 GHz, and the mode converters designed in this way have high conversion efficiencies above 98.5% with their absolute bandwidth exceeding 3.5 GHz and 7.0 GHz respectively.
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Key words:
- coupled wave equations /
- mode converters /
- conversion efficiency /
- absolute bandwidth
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