机构:Russian Academy of Sciences,Budker Institute of Nuclear Physics, Siberian Division
I. A. Kotel’nikov
机构:
[1] Russian Academy of Sciences,Budker Institute of Nuclear Physics, Siberian Division
来源:
Technical Physics
|
2004年
/
49卷
关键词:
Attenuation;
Transverse Wave;
Metal Surface;
Wave Incident;
Strong Absorption;
D O I:
暂无
中图分类号:
学科分类号:
摘要:
It is demonstrated that strong absorption of a TM wave upon grazing incidence on a metal surface is analogous to total transmission of a TM wave incident on a dielectric surface at the Brewster angle. Vanishing reflectance of the metal surface leads to increasing attenuation of oscillations propagating in a waveguide. The ratio κ/k of the transverse wave number κ to the limiting wave number k is on the order of the surface impedance ζ. The attenuation coefficient of H and E waves in a circular waveguide is calculated for an arbitrary relation between κ/k and ζ. It is demonstrated that for κ/k≪ζ, the attenuation coefficient is less than that predicted by the theory based on successive approximations (see, for example, §90 in [1]).