Design of quasi-optical input structure for confocal gyro-TWT
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摘要: 为了解决共焦波导回旋行波管现有输入结构带宽较窄的问题，基于高斯变换，为0.4 THz共焦波导回旋行波管设计了准光注入结构，注入模式为HE06模。该结构由波纹波导模式变换器、高斯变换镜及接收天线构成。对整个注入结构进行了三维电磁仿真，结果表明，在回旋行波管8 GHz的工作带宽内，注入效率大于50%，最大注入效率68%。Abstract: The existing input structure for confocal waveguide is narrow-banded. Thus a quasi-optical input structure for 0.4 THz confocal waveguide gyro-TWT is designed based on Gaussian transformation, and the input mode is HE06 mode. This structure is composed of a corrugated waveguide mode converter, Gaussian transformation mirrors and a receiving antenna. The structure is validated through 3D electromagnetic simulation. The simulation result indicates that, the input efficiency exceeds 50% in the 8 GHz working band of the gyro-TWT and the highest efficiency is 68%.
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Key words:
- THz /
- gyro-TWT /
- confocal waveguide /
- Gaussian transformation /
- quasi-optical input structure
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