Dr. Slick wrote:
I'd like to see the derivation too, as Kurokawa seems to skip it
or just copied it from another paper! haha...

The point that you may have missed is that Kurokawa invents a different
kind of wave called a "Power Wave". He dismisses traveling waves as not
being very useful. So, of course, with the invention of a different kind
of wave, he is free to introduce a different kind of reflection coefficient.
The mistake being made here is trying to assume that his different kind of
reflection coefficient applies to normal forward and reflected traveling
waves. It doesn't.
--
73, Cecil, W5DXP