Jim Kelley wrote:
The standing wave current profile along, for example, a quarter wave
radiator is a cosine function. The gradient then would be the
derivative of the cosine function which is a -sine function.

Yep, the feedpoint is at a current loop (max). The open end of the quarter
wave radiator is obviously at a current node (min). There are electrically
90 degrees of signal between the current loop and the current node on a
standing-wave antenna or on a transmission line with standing waves.
--
73, Cecil http://www.qsl.net/w5dxp


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