LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #31   Report Post  
Old February 9th 08, 06:49 AM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Mar 2007
Posts: 3,521
Default Derivation of Reflection Coefficient vs SWR

Keith Dysart wrote:
Are you sure?


Rs Vg Pfor--25w Vl
+----/\/\/-----+----------------------+
| 50 ohm 23.08w--Pref |
| 48.08w / 1.92w
Vs 45 degrees \ Rl
100 cos(wt) 50 ohm line / 1 ohm
50w \ load
| |
+--------------+----------------------+
gnd

As a matter of interest, let's return to the 45 degree
line, the one to which I objected previously.

The forward power and reflected power are the same as
in the previous example but now the dissipation in Rs
is equal to the sum of the forward power and reflected
power. (It would be nice if all cases were as straight
forward as this special case.)

This is indeed the one special case where everything you
have been saying is true. There is no redistribution of
energy because there is no interference. There is no
interference because at Vg, Vfor and Vref are 90 degrees
out of phase.

These concepts are covered in my magazine article at:

http://www.w5dxp.com/energy.htm
--
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
Convert reflection coefficient to Z Wayne Antenna 30 April 7th 07 04:01 AM
Reflection Coefficient Reg Edwards Antenna 1 June 19th 05 06:50 PM
Uses of Reflection Coefficient Bridges. Richard Harrison Antenna 0 September 18th 03 09:26 AM
Reflection Coefficient Challenge Solved Richard Harrison Antenna 5 September 12th 03 08:25 PM
Derivation of the Reflection Coefficient? Dr. Slick Antenna 104 September 6th 03 02:27 AM


All times are GMT +1. The time now is 07:06 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