On 10 Nov, 19:12, "Stefan Wolfe" wrote:
"art" wrote in message

ps.com...

How does distributed capacitance harvest the energy given
in sino soidal form and later release it in the same form
that it was harvested in?
Same question, but now look at distributed inductance and
how that works!
Distributed resistance is easy, it changes the energy to heat,
stores it and releases it according to its time constant but
the books don't tell me.about the other things!
Like the time constant of distributed capacitance
Art

Hello Art, this is an easy one that any amateur could answer and which I
would think is well below your level of the physics (so the reason for your
question confuses me): If the antenna is perfectly resonant, then it, as a
total charge distribution system or "circuit",
has a time constant of zero.
Where on earth did you get that from?
The circuit has two components that will not allow the sino soidal
circuit to pass intact
and radiation occurs because of a time varient.
So if the sino soidal current is changed to something else
then we have to look for an alternative for the time varience factor.
You have to start from a strong footing and you are not


At any point along the length of the antenna, there are time constants that
could apply, RC or R/L depending upon reactivity of the section in question.
But you are asking about the distributed capacitance; what does that mean,
let's say in terms of any point at a designated distance from feed point?
Where do you want to calculate the time constant? Otherwise, once the
antenna is resonant either by design or by the addition of reactive
components (such as a coil in the center), as a whole it is a resonant
circuit where reactive impedances cancel out and you are only left with
resistance (ohmic + radiation resistance) and the time constant of the whole
circuit must be zero.

You may neutralise the effect of components but you can't get rid of
the components themselves. They still have properties that come into
play with respect to the circuit

Best Regards
Art Unwin KB9MZ......Xg