对无氧铜、铁镍钴合金和镀金铁镍钴合金制作的 WR2.8太赫兹波导进行了传输损耗的研究。通过对比实验测得的传输损耗值, 计算出 340 GHz频段, 无氧铜电导率为 1.6×107 S/m, 铁镍钴合金电导率为 1.0×106 S/m, 相对磁导率为 2.1, 损耗参数的设置对正向设计具有指导作用。实验中, 通过镀金工艺降低了铁镍钴合金波导的传输损耗, 进而明确波导内壁镀金工艺可以有效降低传输损耗, 对降低太赫兹标准窗的传输损耗有着实际意义。

The transmission loss of WR2.8 waveguides made of copper, iron-nickel and gilded iron-nickel alloy at 340 GHz is presented in this paper. The measurement shows the process of gilding at iron-nickel alloy surface can reduce the transmission loss. The test results are compared with those of simulations in order to determine the settings for CST simulation of loss of these materials at 340 GHz. This study is of importance for reducing transmission loss of windows at 340 GHz and setting proper loss parameters for CST simulation of material loss.