Re: [Qucs-help] How to load a S parameters file data.

[Stefan J. <st...@gr...>]

On Mi, 28.09.2005, 11:45, Pedro Crespo Valero wrote:

> Hello,

Hi!

> My name is Pedro and I am a PhD Student at EPFL (Switzerland). I have
> S-parameters measurements of an microwave passive device in touchstone
> format. I would like to use the S-parameters file data facilities of
> Qucs to load this measurements
> as a "black box" in the scheme and add some other circuits to the ports.
> My measurements corresponds to a two-port device. I tried this using a
> "two-ports S-parameters file" object and I put the reference port
> (indicated with "R") to ground but I do not manage even to plot only the
> S-parameters already in the file. Could somebody give me an example/idea
> about how to do this, please???

You're right using the "two-ports S-parameters file" object.  The reference
port (indicated with "Ref" and *not* "R") must be connected to a ground
symbol.  Then you need to connect two "power source" objects to each
of the remaining connections and also add a "S-parameter simulation"
object onto the schematic.  Then you can simulate and plot the S-parameters
already in the file.

Hope this helps,
  Stefan.