- Demonstrate that the electric and magnetic fields inside a waveguide are mutually orthogonal.
- Consider a
mode in a rectangular waveguide of dimensions
and
. Calculate the mean electromagnetic energy per unit length, as
well as
the mean electromagnetic energy flux down the waveguide. Demonstrate
that the ratio of the mean energy flux to the mean energy per unit length
is equal to the group-velocity of the mode.

Richard Fitzpatrick 2014-06-27