相对论返波管模式变换器的研究
Research of Mode Converter for Relativistic Backward Wave Oscillator
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摘要: 根据相对论返波管的需求设计计算了一种模式变换器兼反射器。它将工作模式TM11模转换成TE11模的同时将TE11模反射回去，用普通的喇叭形成高斯波束发射输出。在我们的设计方案中，它是旁壁对称正弦波纹的圆波导,变换器的中心频率为10GHZ。数值模拟结果显示，变换器的长度为7个周期时，中心频率点转换的效率已经超过了90％，工作频带能够达到± 0.3GHz。Abstract: According to the requirement of relativistic backward wave oscillator, a mode converter (and also a reflector). It converts the operating TM11 mode to TE11mode and at the same time, reflects the TE11 wave. At last, Gaussian-like HE11 mode is output by a metal horn. It is designed as a periodic cylindrically symmetric sinusoidal corrugation waveguide. and operates in 10GHz. Numerical simulations show the conversion efficiency in center frequency is over 90 percent, and the bandwidth is about 0.3GHz.
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Key words:
- mode converter /
- corrugated waveguide /
- bragg reflector
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