[Enki]

Hi,

Try ‘lossy_inductor.sch’ from the Simulation_AC example project.  I ran it myself and it works but I can not make it run in your schematic.

I hope it helps

 

[Enki]

Hi Carsten,

Is this what you want to achieve?

• This reply was modified 3 years, 2 months ago by Enki.
• This reply was modified 1 year, 9 months ago by maelh. Reason: Convert all remaining http links to https links

[Enki]

Hi Carsten,

I wanted to try the QucsStudio EM capabilites with a simple design: end-coupled half-wavelength bandpass filter. One of the task I want to perform for the filter design is to model the gaps between the resonators to calculate their length and link it to the lowpass prototype.

How? 

I created a simple pcb layout with two copper strips and a gap separating both of them. After that, I need to change the gap width, take the s-parameters from the simulation, extract the capacitor pi-model and create a table that relates the lowpass admittance inverters with the EM simulation.

I also need to do a de-embbeding for a more accurate modelling.

By been able to manipulate the layout and run the EM simulation I could automate the process with a matlab/octave script.

What did I get?

I got it with the .sch and TL components but I want a more accurate simulations with the EM option.

What I can’t do?

• De-embedding
• Run the netlist file from a pcb layout using a Matlab/octave script

I’ve included the project with the schematic and layout. You can generate the netlist from both and see they have different formats. When I try to launch a simulation with qucssim.exe it does not work. I believe I could do it by calling qucsfdtd.exe but I don’t know how. I guess that the right person to answer that is Michael Margraf.

Attachments:

1. Gap-modelling-1.qucs

[Author]

Posts