partly Open source replacement for ADS

[noori.re]

Hello,

I'm trying to realize a bandpass filter using a microstrip coupled line.
There is a possibility in ADS to simulate these structures (as shown below).

But I don't have ADS. Is there any open-source tool to do it for me?
Can I do it using Qucs? ( I had a look on Qucs, and it doesn't seem to be possible ).

--- Updated Jan 19, 2023 ---

I found the solution here in page 28.

 

[BigBoss]

Download SonnetLite to simulate such EM structures. It has limited capability but it's enough for your purpose.

Sonnet Lite

www.sonnetsoftware.com

 

[vfone]

Ansys Electronics Desktop Student offer a wide range of RF components, including linear printed models and EM simulation:

Ansys Electronics Desktop Student Version | Free Software Download

Get a free download of Ansys Electronics Desktop Student, which includes HFSS, Maxwell, Q3D Extractor, and Icepak, for simulating antennas, RF, microwave and PCBs.

www.ansys.com

 

[dick_freebird]

I believe ngspice will "do stuff" with s-param models
but getting those from a layout geometry, I got nuthin'.

What is the goal and the "sandbox" - do you have the
models and just need the numerical solution(s) for
various analyses, or are you trying to what-if a physical
design through EM -> Sparam -> SPICE type feedback?

Free simulators tend to lag the $$$,$$$ ones in adding
the edgy RF / RFIC analyses that Real RF Designers
like to use (PSS, etc. are kind really analytical tools that
ride on tran; HB, I have no idea what underlies that).
And what you want for results > methods, even less idea.

 

[noori.re]

I believe ngspice will "do stuff" with s-param models
but getting those from a layout geometry, I got nuthin'.

What is the goal and the "sandbox" - do you have the
models and just need the numerical solution(s) for
various analyses, or are you trying to what-if a physical
design through EM -> Sparam -> SPICE type feedback?

Free simulators tend to lag the $$$,$$$ ones in adding
the edgy RF / RFIC analyses that Real RF Designers
like to use (PSS, etc. are kind really analytical tools that
ride on tran; HB, I have no idea what underlies that).
And what you want for results > methods, even less idea

I wnated both synthesis and simulation. for my purpose the Qucs studio worked and did his job good.

 

[volker@muehlhaus]

Yeah, your initial question was misleading because the ADS screenshot shows the wrong circuit element. You would prefer CLIN for this (two coupled lines defined by even and odd mode) , not TLOC (one open circuited line with signal + ground pins).

 

[noori.re]

Yeah, your initial question was misleading because the ADS screenshot shows the wrong circuit element. You would prefer CLIN for this (two coupled lines defined by even and odd mode) , not TLOC (one open circuited line with signal + ground pins).

I got it form my online course! Anyway, I think the problem is solved by now.