Cecil Moore wrote:
Jim Kelley wrote:
The term x is the phase of the cosine function, Cecil. The phase of
the standing wave function varies by 90 degrees along the length of a
1/4 wave resonant standing wave antenna.

I'm sorry, Jim, that is just not true. The standing-wave
function has a *constant phase* along the length of a 1/4WL
monopole for any fixed (t). Cos(x) is the *envelope amplitude*
function (not phase function) for any fixed (t).

Refer to a table of sines and observe the two things which vary
throughout the period of any sinusoidal wave. One of them is amplitude.
What would you prefer I call the other one?

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