ah found it shockwave...
(it was at your site of course hihi)
Welll yes it does relate.
If you take a look at the "o" ampere point (green)
You will see that moving along the radiator.....upwards.
Now just think of the antenna and a curled thing around it.
(that round fire escape or tornado figure)
that thing is rotating...and presenting your "o amp" spot.
Presenting a radio wave moving up the antenna.
It is current magnitude that changes... (and displayed)
(A/m it says...)
So if we "concentrate" on the 0 amp thingy
We see that single "o amp" spot moving...
And because of that vertical change in "heigth" we can realise there are different
angles...nothing else is capable of "indicating" that.
If that "0" amp spot wouldnt move...there was only "magnitude" and a single angle...
Now, because of there are different angles (phase angles...and thus going....around the antenna and because we are looking in time (hence the radio wave is moving upwards) we see that 0 amper spot going upwards.
And ill bet the "speed" of the wave moving is telling us indirect how the phase is.
Taking a look at any "current- phase log" we see the phase difference getting large really fast...and remaining rather "equal" for a period of time.
That remaining rather equal....is presenting the phase "peak" .
And that going "fast" the phase "shift".
But the above is substraction from the cst plot is just....probarbly...it would be (more than) logical....
However we will never be 100 percent sure...simply cause the data is not provided.
regards, H>