0.22THz折叠波导行波管初步实验研究

Initial experimental study on 0.22THz folded waveguide TWT

探索性试验了多种微加工技术加工设计频率0.22THz的折叠波导慢波结构,最终选择了微铣削工艺进行加工,并测试了微铣削工艺加工的WR4标准直波导的损耗特性,得到了0.22THz电磁波在无氧铜中传播时材料的相对电导率约为3.2×107S/m。以此为基础设计和制得了国内第一支0.22THz折叠波导行波管,经过测试和标定得到输出功率大于100mW,带宽3.5GHz的初步实验结果。

Several micro-machinings were used to manufacture 0.22 THz folded waveguide slow wave structure.In these micro-machinings,micro milling was most suitable for manufacturing 0.22 THz folded waveguide slow wave structure now.And the loss of WR4 waveguide manufactured by micro-milling was tested.The relative conductivity of 3.2 × 107 S/m was obtained when electromagnetic wave of 0.22 THz propagated in oxygen-free copper waveguide.Finally,a 0.22 THz folded waveguide TWT was developed and experimented with output power greater than 100 mW and 3 dB bandwidth of 3.5 GHz.