Post on 03-Feb-2022
Topic #15. Plane wave in lossy media (p367-373) Sarfaraz Hakam
Plane Waves in Lossy Media: The source free wave equation in lossy media is
Wave number : (complex number)
Complex permittivity:
Equivalent Conductivity:
Propagation constant: (complex number)
where and are the real and imaginary part of the propagation constant.
The source free wave equation in lossy media is
For uniform plane wave propagating in Z direction:
(polarized in x direction)
Propagation Factor
Attenuation Factor
Attenuation constant
Phase factor
Phase Constant
Topic #15. Plane wave in lossy media (p367-373) Sarfaraz Hakam
Low Loss Dielectrics: is a good but imperfect insulator with non-zero equivalent conductivity such that or
Propagation Constant
Attenuation constant
Phase Constant
Intrinsic Impediance
The phase velocity
Good Conductor: is a medium for which .
Propagation Constant
Topic #15. Plane wave in lossy media (p367-373) Sarfaraz Hakam
Intrinsic impedance:
The phase velocity
The Wavelength of a plane wave in a good conductor is:
Skin Depth or Depth of penetration: (It is the distance through which the amplitude of a traveling plane wave decreases by a factor of e-1 )
In good Conductor: