Is this a true stripline combiner ? - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 4 Old 08-20-2012, 05:56 AM - Thread Starter
Newbie
 
JAVSF's Avatar
 
Join Date: Aug 2009
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Found this while searching with Google (something that appears to have less and less results nowdays...).
http://www.serigo.ee/product_info.php?products_id=78881&language=en&osCsid=8a380b415684a72e5f840c9937cded2f

Looking at the PCB it doesn't seem to have the topology I've seen on other stripline combiners, yet it mentions .2db loss in the specs.
Anyone had any experience with these ?

Regars
José
JAVSF is offline  
Sponsored Links
Advertisement
 
post #2 of 4 Old 08-20-2012, 05:59 AM - Thread Starter
Newbie
 
JAVSF's Avatar
 
Join Date: Aug 2009
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
By the way, you can view much bigger pic of it if you click on the image...
JAVSF is offline  
post #3 of 4 Old 08-20-2012, 01:07 PM
AVS Special Member
 
holl_ands's Avatar
 
Join Date: Jun 2004
Location: San Diego, CA
Posts: 3,616
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked: 57
It looks more like a simple two step Wilkinson impedance transformer, using quarter-wavelength "stubs":
http://www.microwaves101.com/encyclopedia/Wilkinson_splitters.cfm
http://whites.sdsmt.edu/classes/ee481/notes/481Lecture9.pdf
As additional stages are added, the bandwidth can be extended (as we need for TV Bands):
http://www.ijser.org/researchpaper%5CEffect-of-Adding-Input-and-Output-Impedance-Transformer-on-Wilkinson-Power-Dividers-Performance.pdf

Call Triax and ask them to provide an insertion loss vs frequency plot when used as a combiner.
BTW: That brochure is from 2006 and the p/n is not found in 2008 and later catalogs,
so don't be surprised if they no longer make that part.
holl_ands is offline  
post #4 of 4 Old 08-21-2012, 04:14 PM
Advanced Member
 
fastl's Avatar
 
Join Date: Sep 2007
Location: Boston
Posts: 572
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 11
That is not stripline, it's microstrip. The transmission line is buried between ground planes in stripline.
fastl is offline  
Reply HDTV Technical

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

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