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
page, please do.
Below are all of the forum threads, including all
the responses to the original posts.
Post subject: balun electrical model Posted: Wed Sep 12,
2007 8:31 am
Joined: Wed Sep 12, 2007
I'm searching for an electrical model for a
balun (type anaren BD2425J50100A00, a 1 to 1 RF transformer working
- not a S3P parameters but a model with mutual inductance,
capacitors and resistors - like a P-spice model and how can i proceed
to find components value ?
Thank you for your help.
Post subject: Posted: Wed Sep 12, 2007
Joined: Mon Jun 27, 2005 2:02
I don't think that what you
are looking for is available, as this is a passive RF device. The only
interesting information of a Balun to my humble opinion are the S-parameters
which you only need to model this device in terms of return losses and
As this is a passive and not active device
there are no junction capacitances or inductances which are used in
What would you like to know: The capacitance and
inductance of the transmission lines of which the Balun is made of?
Post subject: Posted: Thu Sep 13, 2007
Joined: Wed Sep 12, 2007 8:04
I already have the S-parameters of the balun but
i would like to simulate (in term of current and power) the output of
my silicium with the output matching network (on my board).
OK it's a passive device and so the model of a balun should be equivalent
to a network composed by 2 coupled inductors, 1 resistor , 1 capacitor(or
more) ... that's what i would like to find.
Post subject: Posted: Fri Sep 14, 2007 2:57
Joined: Sun May 14, 2006 8:53 pm
If you have s-parameters, you could apply
these to your model. And fit the values to match the response.
Mutually coupled inductors, with series resistance (for line loss)
and coupling capacitor (for line coupling) would be a start.
Post subject: Posted: Tue Sep 25, 2007
Joined: Tue Mar 15, 2005 11:43 pm
To add the comments
above, I believe that Microwave simulator ,e.g. Microwave office has
the ideal model of the Balun, which you can modify the parameters to
match the available s-parameters.
And if I am not wrong, this model
will enable you to simulate nonlinear analysis (current and power).
balun practical examplePosted: Sat Nov 24, 2007 3:37 am
Joined: Fri Nov 23, 2007 11:59 am
I would like to use this thread and ask where I can find
a good practical design example of a balun for L band.