摘要
提出了一个新的圆波导特征方程,并称之为普遍方程。它既考虑了金属壁的有限电导率,又考虑了波导内壁处可能存在的介质层。用Muller法进行了精确计算,用微扰法作近似计算。考虑到在截止波导襄减标准方面要求高计算精确度,本文的讨论重点放在截止区。
The new characteristic equation of circular waveguides is discussed. This equation assumes not only that the metallic conductivity of the guide wall is finite, but also that there is a uniform dielectric coat on the inner wall of the waveguide. The exact solution and the approximate calculation are obtained by the Muller's method and the perturbation method, respectively. In view of the higher computation accuracy of the attenuation standard of the waveguide below—cutoff(WBCO), the discussion of this paper pays more attention to the cutoff region.
关键词
波导
特征方程
截止波导
微扰法
characteristic equation, waveguide below-cutoff, perturbation method.
