@ Marconi,
Pse see my new post to you at the end of page 11..
@ Shockwave:
.....when you say...."i have to admit"..."it's making little sences...
Would that be: you understand a litlle...Or not ?
If not...
Of course phase changes along the length of the radiator....
And thats why the angle is expressed along the (in this case) vertical and thus heigth...segmentations.
However the single angle provided is given from a "above" view".
I understand its difficult to see....but one has to "think" 3d...instead of just looking in 2d against that vertical wire.
So its more or less a vector....
At first we have the "heigth" of that wave. (along the radiator)
At that height there is a certain current with a magnitude...
And that maximum magnitude at that point can be pointed in a specific direction (under a horizontal angle).
At thats the current phase angle.
Its "cruled"...twisted...
So, yes it is logical that with heigth the angle changes.
However the angle provided is not given with a magnitude point of view.
Most people look to much at the magnitude of that line...and "see" it going through the ax of the antenna.
But that says nothing about the ANGLE...it only shows there is no magnitude.
THe angle could be a lot of things.
It is provided at a "single" segment heigth...and therefor horizontal (in this case)
take for example the radials under the antenna.
there are 4 radials they are at a 90 degree angle in reference to the antenna.
But the radials are 45 degrees seperated from each other.
Now, that last one is how the phase is given the angle between them...not from the vertical antenna...
Thats how the angle is and should be given.
Regards, H>