On Feb 2, 7:06*pm, Wimpie wrote:
Hello Tony,

On 2 feb, 19:14, "Antonio Vernucci" wrote:

A bipole is symmetrical, obviously the internal circuity of the trap
is not symmetrical *.

Jimmie, that is not the point.

At some frequency, everything becomes a distributed component, it
depends on size/lambda ratio and application. *Many distributed
components can be modelled based on theoretical lumped components
(with sufficient accuracy), but a ground for modelling stray
capacitance is frequently required.

True lumped component behaviour, in my opinion, only applies to
networks with size=0.

'True' or theoretical versus 'practical' is a very important
distinction that is, or at least was, taught in engineering classes.
it is very important to know when you can apply the practical
simplifications that allow you to do design work without worrying
about insignificant phenomena in the problem domain you are working
in... so if i am designing an HF antenna I know that objects below a
given size can be safely ignored, but if i'm doing a microwave design
i have to take into account much smaller objects.