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electric length - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


 Post subject: electric length
Posted: Tue May 20, 2008 1:34 pm 
 
Lieutenant

Joined: Tue May 20, 2008 1:31 pm
Posts: 1
hi, someone can help me?
I need found one way to find the electric length using a S parameters. I need need equation to implement in matlab.
thanks


 
   
 
 Post subject: Re: electric length
Posted: Thu Jul 09, 2009 12:47 pm 
 
Colonel

Joined: Wed Apr 08, 2009 11:07 am
Posts: 34
electrical length of what? If it is well matched and well behaved, like a transmission line, you can figure out the group delay passing thru it by looking at angle[s21].

Td=delta phase/delta frequency

ang[s21] at 1 ghz = -20 degrees
angl[s21] at 1.1 ghz = -25 degrees

Td=(25-20)/((360 deg/cycle)*100MHz) = 138 pS electrical length

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Posted  11/12/2012
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