Cecil Moore wrote:
Jim Kelley wrote:
Kraus on the other hand ignores almost nothing about antennas. (for
ref. I'm looking at his 2nd edition.)

On the contrary, for the purposes of current analysis on
a standing-wave antenna, Kraus ignores everything except
the current in the standing wave.

Kraus, in his book entitled "Antennas" ignores almost nothing about
antennas. I don't believe that is a controversial point of view.

Of those things, only maximum current would have any dependence at all
on the nature of the antenna. How does one know what value Imax to
plug-in for each segment?

Kraus normalizes the feedpoint current to 1.0 and that's
good enough for me.

Yes, unless of course you're talking about a real antenna with actual
current on it. That is what I thought we were talking about. My
recollection is that it was resonant on 75 meters, and the coil and
stinger have very specific dimensions.

The actual value of Imax obviously depends
upon the power incident upon the antenna. If one assumes a
current of 1.0 at the feedpoint of the coil, then one can calculate
the Imax at the base of the stinger given the Z0 of the loading
coil and the Z0 of the stinger.

It might even be better to measure it - with some type of current probe
device. Then you could solve for phase at any x or t you want.

ac6xg