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microwave splitter design QUESTION - 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: microwave splitter design QUESTION Posted: Wed Apr 23, 2008 8:14 pm


Joined: Wed Apr 23, 2008 7:44 pm
Posts: 2
Location: Folsom CA
I need a (quick and dirty) splitter design.

0.1 to 1.0 GHz
5W max input power,
connectorized with BNC.

I am thinking of going with a Wilkinson configuration.

Is there a quick and easy solution for this? Such as an online Wilkinson calculator?

I investigated using an SMT device and mounting it on a PCB, but they're not rated any higher than 2W.

Any comments will be appreciated.


Post subject: Posted: Thu Apr 24, 2008 2:36 am


Joined: Wed Jun 20, 2007 3:01 am
Posts: 22
Dear chukster,

For online Wilkinson calculator;

Best Regards,
imodelit Moderator


Post subject: Posted: Thu Apr 24, 2008 8:14 pm


Joined: Wed Apr 23, 2008 7:44 pm
Posts: 2
Location: Folsom CA

now from there how do I translate those numbers into hard values?

such as: "L" is the inductor, I guess. And the unit of measure is "m" (meters?)

how do I get that in microHenrys?

Any responses are appreciated!


Post subject: Posted: Sat Apr 26, 2008 2:56 pm


Joined: Wed Jun 20, 2007 3:01 am
Posts: 22
Hi chukster,

Well, if you are satisfied with divider's behavior, you can convert from the electrical parameters into physical parameters, as Zo=sqrt(Eeff)/(Co*C), where Co is speed of light and C is the capacitance per unit length. Then calculate the line inductance as L=(Zo^2)*C (inductance per unit length). Finally, multiply the calculated inductance by the line length.

Best Regards,
imodelit Moderator


Post subject: splitter etc design toolPosted: Wed May 07, 2008 8:10 am


Joined: Fri Nov 02, 2007 3:45 am
Posts: 8
Location: germany
try the free rf tool
it has an integrated design tool
to calculate all kinds of splitter, divider etc. resistive and wilkinson -
anyway its a graet tool to do some simple
simulations in rf and its free -

but remember your splitter must handle that power when calculating
values especially when using resistive splitter instead of
wilkinson design !!


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