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Another interesting clue as to how the cone functions with RF currents can be noticed in the CST computer model I posted years back. Pay particular attention to the shape of the current node around the 1/4 wave cone. The 1/4 wave radiator always shows maximum current at its base feedpoint with the current steadily reducing over that length.

That is not at all what the computer model is showing in the 1/4 wave cone section of this antenna. Here we have a 1/4 wave radiator that manages to show maximum current right in its center at though it was a 1/2 wave! I can only replicate this current node shape in modeling when the 1/4 wave element is excited with RF from both ends... I have long suspected that this second current is folding over the top of the cone and radiating on its outside surface, in a constructive phase.

[QUOTE="Shockwave, post: 699936, member: 10882"] Another interesting clue as to how the cone functions with RF currents can be noticed in the CST computer model I posted years back. Pay particular attention to the shape of the current node around the 1/4 wave cone. The 1/4 wave radiator always shows maximum current at its base feedpoint with the current steadily reducing over that length. That is not at all what the computer model is showing in the 1/4 wave cone section of this antenna. Here we have a 1/4 wave radiator that manages to show maximum current right in its center at though it was a 1/2 wave! I can only replicate this current node shape in modeling when the 1/4 wave element is excited with RF from both ends... I have long suspected that this second current is folding over the top of the cone and radiating on its outside surface, in a constructive phase. [/QUOTE]

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