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9th December 2019, 07:59 #1
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9th December 2019, 10:35 #2
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Re: ADS Simulation of Circuit Help
Show what you have done so far and what your results are.

13th December 2019, 07:33 #3
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Re: ADS Simulation of Circuit Help
Magnetless Non reciprocal Metamaterial.pdf
My circuit is not giving me any meaningful result. I have attached the paper which I am trying to reproduce, simulate. Any suggestion will be very helpful.

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13th December 2019, 08:20 #4
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Re: ADS Simulation of Circuit Help
For linear simulation use SParameter model (S2P) of that transistor for that operating point. Do not use the nonlinear model.
Missing drain inductor, wrong width of bias line
If you want to do nonlinear analysis, see ADS help. And check transistor model parameters. Also check your bias and DC operating point. Your 0.4V supply voltage looks wrong, there seems to be a misunderstanding bias voltage in the paper.Last edited by volker@muehlhaus; 13th December 2019 at 08:29.

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13th December 2019, 14:13 #5
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Re: ADS Simulation of Circuit Help
Your Nonlinear model is not correct and this transistor is obsolete.
If I were you, I use more recent part ( CE3512K2) for its equivalent and request nonlinear model from Modelithics.If you're a student, Modelithics will probably supply quite accurate model of this transistor so you will able to do your simulations in a certainty.

14th December 2019, 09:41 #6
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Re: ADS Simulation of Circuit Help
As I am new at ADS software, so my questions may seem line very beginner level.
1. ADS doesn't have the S parameter model of this transistor probably. Any document or reference guideline for this kind of design would be helpful.
2. How to find out what should be exact bias voltage, authors didn't reply.
3. I am supposed to model this circuit and produce exact graph before simulating in different freq. Any suggestion or guideline would be very helpful.
   Updated   
Thanks for your reply. How to solve or fix my nonlinear design model? Yes, CE3512K2 can be an option. Any reference document or guideline for nonlinear modelling in ADS?
Thanks

15th December 2019, 06:59 #7
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15th December 2019, 11:16 #8
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Re: ADS Simulation of Circuit Help
There are many examples included with ADS.
Start with examples on Sparameter simulation (linear simulation, Sparameter models at one specific operating point, no bias or supply voltage required in simulation)
Also search for "ads circuit design cookbook"
Authors specify 30mA drain current, set the gate voltage as required for 30mA. Use voltage and current probe in ADS. There is also a DC curve tracer template in ADS.
But that is for nonlinear simulation. Make sure to understand linear (Sparameter) simulation where the S2P transistor model has builtin the response at one specific bias. We don't need bias or supply sources in linear simulation with "SParamter simulation" controller.
From 20 years experience in simulation: It often happens that published simulation results cannot be reproduced because some detail in the paper is wrong or missing (by mistake or on purpose).
1 members found this post helpful.

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15th December 2019, 23:29 #9
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24th December 2019, 19:16 #10
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Re: ADS Simulation of Circuit Help
Hi,
I communicated with Modelithics for the transistor model. But CEL model are not free and they have university offer for complete library which is costly for single user like me. I got below 2 papers for that transistor model in their website. How can I develop my required model from that paper values. Thanks in advance.
https://www.modelithics.com/models/d..._datasheet.pdf
https://www.modelithics.com/models/V...L/CE3512K2.pdf
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