Well, I don't understand this stuff nearly as well as you, so that is why I argue when I see things differently.
Again, you make statements that are open ended so you have a way out, I presume. I read these words as though you are indicating a negative effect will occur on the impedance when raising the radials on this .625 wave antenna. I find the very opposite in these models.
You post:
And this leaves the reader to guess what you mean and what result you are suggesting.
I'll tell you flat out, when I raised the radials on the 5/8 wave radiator I saw the natural match improve by about 50%, and that was without any matching device.
So, IMO the slanted down radial model would require 1/2 the transformational energy to match the antenna. I see that as a possible plus, and there was no difference in maximum gain angle, the gain dropped a very little bit, but the pattern was improved with the higher lobe generated by the 1/8 wave bottom portion (I presume) pushing the pattern down due to the slanted up radials, another presumption.
Here it is for you and Homer to mull over and pick apart. You will note that the radiator length is indicated by wire #2, for both models, and the caption for the horizontal model indicates the radial length. I used the same model to generate both.
[ATTACH]8155[/ATTACH]
