LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #1   Report Post  
Old January 30th 05, 07:12 PM
Jaggy Taggy
 
Posts: n/a
Default "Compound" SWR question

I am trying to learn more about antennas and transmission lines and am
currently reading through the transmission line chapter of a recent ARRL
Handbook.

There is a calculated example for a load with a certain SWR connected to a
transmission line with certain losses and the author states:

"Because of losses in a transmission line, the measured SWR at the input of
the line is less than the SWR measured at the load end of the line."



My first reaction was Oh my God, I am soo proud of my decent SWR at the
input of my antenna feedline and in reality I could have a really bad
mismatch between the antenna and the transmission line and wouldn't even
know about it.

And my second thought was what is happening to the energy, since an SWR
gives me an indication of how much power reaches the antenna and how much is
either radiated from the feedline or lost as heat and here I have two
different SWR in the system, one at the antenna and one for the
antenna/feedline system.

I think it can't be that I would loose a whole lot at the antenna (high SWR)
but then wouldn't loose all that much for the system since the overall SWR
is lower.


Where do I go wrong??

Uwe

 
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
Interesting question JAMES HAMPTON CB 3 December 7th 04 09:34 AM
Question Pool vs Book Larnin' Mike Coslo Policy 24 July 22nd 04 05:50 AM
QEI INC. QUINDAR RADIO UNIT TELEMETRY QUESTION got from hamfest john private smith Swap 0 November 22nd 03 04:19 AM
BPL Video On-Line JJ Policy 31 August 17th 03 09:12 PM
Question regarding police tactics and scanners noobie Scanner 0 July 29th 03 12:48 AM


All times are GMT +1. The time now is 10:33 PM.

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