Re: Transmission line ?

From: Steven Gray (sgray2_at_NOcfl.rr.comSPAM)
Date: 09/06/04 

Date: Mon, 06 Sep 2004 20:16:09 GMT

Rene Tschaggelar <none@none.net> wrote in
news:413c86c6$0$709$5402220f@news.sunrise.ch:
>> Standing waves need not have nothing to do with resonance. Talking
>> about standing waves on a non-resonant transmission line makes perfect
>> sense. The OP was having trouble understanding that length is not an
>> important consideration. I'm afraid you've confused him further.
>
> Not intended.
> Isn't a standing wave the interference of a wave going this way with
> a (reflected) wave going the other way ?

Yes.

> So when playing with pulses
> or even only slopes, there won't be anything resembling a wave
> anymore.
> No ?
>
> Rene
>

Yes. Generally speaking, when we talk about standing waves we're talking
about CW behavior. Of course, that begs the question, since we deal with
non-eternal things in real life. If a pulsed signal has long duration
compared to propagation times up and down the line, then there will be
standing wave for a period of time after the pulse has been on for
"awhile" and not yet turned off. 

-- 
Steve Gray
sgray2@cfl.rr.com