Re: [Qucs-devel] Radial Stub und Co

[Sebastian H. <seb...@gm...>]

Hello Stefan,

I tried to implement a more complete model (for fun only), validation is 
pending right now.

Your model seems to be ok -- I was fooled by the smith chart display of qucs, 
which does no autoscale... I consider this broken.

In the mean time a attended the IMS2009 and talked to the Sonnet people -- 
they really like the idea of a free simulator and would also help in 
integrating sonnet into qucs. That's a long way to go, since there is no 
layout at the moment, but I think the idea is great.

They permitted the use of Sonnet Lite to validate the microstrip models in 
qucs. I'll try to do that.

I feel quite enthusiastic having a simulator which does not suffer from the 
broken microstrip Tee models ADS and aplac use (maybe to be implemented...).

I already switched from Ansoft Designer SV to qucs for my simlulation class 
this term. It worked great. Good work!

I'll get back to you if the validation is done.

Sebastian


On Monday 15 June 2009 12:55:15 Stefan Jahn wrote:
> Am Mo, 25.05.2009, 17:14, schrieb Sebastian Held:
> > Dear Stefan,
>
> Hello Sebastian,
>
> > I did a short validation and got the feeling, that the model is broken.
> > ADS and Momentum agree well, thus Qucs is in error here, I think.
>
> This is possible.
>
> > Can you please point me to the reference documentation of the radial stub
> > element in Qucs, to check again if I got the parameter comparison right?
>
> Please look at the sources.  Currently I can't remember the external
> source, but I had it somewhere...
>
> Thanks for verifying Qucs,
>   Stefan.