RadioBanter - View Single Post

May 18th 06, 10:19 PM posted to rec.radio.amateur.antenna

On 18 May 2006 13:52:52 -0700, wrote:

Wow. You spent a lot of time on this. Thanks.

Hi Glenn,

Most of this time has long preceded these posts (by as many years as
Reggie has been posting here).

Would you consider this system linear?

Yes.

I'm not sure I'm going to go anywhere with this, and I'm not setting a
trap. I'm just curious what conditions would have to be set before you
would consider a transmission line system linear (you are welcome to
add any conditions I might have forgotten).

I see no reason to constrain an open-ended topic; your definition is
fairly self referential after all:
I define X as a linear system;
Is X linear?

What correspondence that follows may upset the apple-cart, but aside
from the velocity factor gaff (which bears no relation, yet, on
linearity), I have no dispute.

What could upset the apple cart? Power.

Power has the capacity to distort systems and introduce
non-linearities even in your simple example. If I were to expand upon
what you call the subtle effects (they were in my earlier discussion);
this would give rise to back-scattering which could power limit the
line (in other words, it could never deliver more than a baseline
value). The onset of this condition is, again, nothing anyone here
has ever experienced, and to even approach this limit in the lines you
have constructed would tax most sources.

Such topics that may appear to be new here, have been exhibited in
fiber optic transmission lines for quite a while now.

73's
Richard Clark, KB7QHC