How to model a generic amplifier stage in FEKO?

Marcos Paz
Marcos Paz Altair Community Member
edited September 2022 in Community Q&A

I'm interested in simulating radiated fields of an HF Receiver device (45MHz is the intermediate frequency of work). The main stages of the Rx PCB are coupled filters (with LC resonance at 45MHz), so I simulate them by helix elements, line elements and ports loaded with capacitors. So far everything is fine, but I can't find a proper way to simulate inner stages which work as amplifiers. I tried to create a port and load a SPICE subcircuit with a voltage-dependant voltage source, modeling in this case the source factor as the amplifier gain. It didn't work, I don't remember well the error but it was related to the SPICE file subcircuit (I'm attaching it to this post).

I'm not sure if it is OK the manner I've chose to make the simulation, so I want to ask you:

Do you have some idea about how to simulate an active amplifying stage in FEKO guys? Apart from that, anyone can check of the subcircuit file is OK?

Greetings

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Answers

  • Johan_Huysamen
    Johan_Huysamen
    Altair Employee
    edited September 2022

    Dear Marcos

    The SPICE circuits used in have have to be passive and including components with gain would therefore not be supported. It is likely that this would be why you received an error.

    If you are able to provide more information on your application, maybe some suggestions can be made.

    Kind regards,

    Johan H

     

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