LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #11   Report Post  
Old December 28th 07, 07:44 PM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Mar 2007
Posts: 3,521
Default Standing-Wave Current vs Traveling-Wave Current

Keith Dysart wrote:
I suppose this non-sequitor means that you agree that
an ideal section of transmission line, just like an
ideal inductor and capacitor, will store energy forever
if provided with the appropriate initial conditions,
but do not wish to admit it.


I freely admit that it can happen in your mind (like
leaping tall buildings at a single bound). I do not
believe it can happen in a real-world situation. But
if you can demonstrate lossless transmission lines
and lossless inductors on the bench, be my guest and
probably win a Nobel Prize in the process.

An intriguing thought experiment is to take several
of these sections with stored energy (with the proper
phase relationship) and connect them together. Do
the reflections present at the ends of the short
sections suddenly disappear when the sections
are connected to form a longer line? Are the
reflections now only occurring at the ends of
the longer section?


Reflections are impossible except at physical impedance
discontinuities. There are zero reflections at a point
in a smooth fixed Z0 section of transmission line. Cut
the line and you get 100% reflection. That's why your
assertions of "no change" don't make sense. You would
have us believe that short circuit to open circuit is
"no change"??? If that is true, there's "no change"
between a shorted 1/4WL stub and an open 1/4WL stub.
--
73, Cecil http://www.w5dxp.com
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Standing Wave Phase Tom Donaly Antenna 135 December 15th 07 04:06 PM
Standing wave on feeders David Antenna 12 May 21st 07 05:22 AM
Dipole with standing wave - what happens to reflected wave? David Antenna 25 September 6th 06 01:39 PM
Newbie ?: I've Built A Simple 1/4 Wave Dipole for 2 Mtrs. Could IMake a1/2 Wave? WolfMan Homebrew 4 September 29th 04 02:40 PM
What is a traveling-wave antenna? jopl Antenna 7 April 16th 04 10:56 PM


All times are GMT +1. The time now is 10:09 AM.

Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright ©2004-2025 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017