太赫兹波在有限电导率金属空芯波导中的传输特性

研究了太赫兹波在具有有限电导率的金属镀层空芯波导中的传输特性.从其传输的特性方程出发，利用Newton-Raphson迭代方法数值模拟了传输损耗和相位常数随太赫兹波频率、波导内径以及波导中金属镀层的电导率的变化关系.结果表明，采用大芯径波导和高电导率的金属镀层能有效降低太赫兹波的传输损耗. 关键词： 太赫兹波 空芯波导 特征方程

Transmission properties of terahertz wave in finite conductance metal-coated hollow waveguide

The transmission properties of terahertz （THz） wave in metal-coated hollow waveguide are studied. Based on the characteristic equation of THz electromagnetic wave in metallic hollow waveguide， the dependence of the transformation attenuation and phase constant on the frequency of THz wave， inner radius of the waveguide and conductance of the metal material is simulated by using the Newton-Raphson iterative method. The results show that， the transformation attenuation can be decreased effectively by using large radius waveguide and high conductance coating metal.