Cecil Moore wrote:

Any person with a modicum of mathematics skill can
look at the following equation and know that there
is no phase shift relative to x in 1/4WL of wire or
coil.

To the extent that 'a modicum of mathematics skill' is
like 'a little knowledge', I suppose anything is possible.

Itot = Imax*cos(kx)*cos(wt)

Noting the linear variables and constants in there, and the absence of
anything that would change abruptly at certain particular values of x,
what would the expression for a standing wave on a shortened coil loaded
90 degree monopole have to look like?

ac6xg

"To convert from units of current to units of mass simply multiply the
superposition trig identity by mass (and ignore the factor of 2): Mtot =
Mmax*cos(kx)*cos(wt). Try it with any units you like!"