Design of Ka-band high power miter bend
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摘要: 介绍了一种基于准光技术的高功率斜角弯头的设计方法，可实现圆波导TE0m模式的高效转弯传输。使用模式变换器将工作模式TE0m转换成锥形高斯模，经过转弯后，锥形高斯模被重新转换成工作模式。这种锥形高斯模可以减少波束在镜面的衍射，从而实现工作模式的高效率转弯传输。基于这一方法，设计了工作在Ka波段、工作模式TE01的MW级波导斜角弯头。HFSS计算结果表明： 在8%的带宽内，传输效率大于98%。Abstract: A method based on quasi-optical technology is presented for designing high power miter bend. It can realize high efficiency transmission in bend circular waveguide for TE0m mode. A conical Gaussian mode is generated from the propagated mode TE0m with the help of mode converter and then converted back to the propagated mode TE0m after the bend. Efficient transmission of the propagated mode is achieved since the conical Gaussian mode could decrease the diffraction losses at the mirror. A megawatt, TE01 mode miter bend with an operating frequency at Ka band is designed with this method. The HFSS results show that the transmission efficiency higher than 98% is obtained in the frequency band of 6.5%.
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Key words:
- high power microwave /
- overmoded waveguide /
- miter bend /
- quasi-optical technology
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