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S-parameters from a RF Circuit - Circulator created from LC resonators

EduardoGS

Hello everyone.

I am trying to simulate, for my undergraduate thesis, a new RF circulator that was published by Nature Physics on article called "Magnetic-free non-reciprocity and isolation based on parametrically modulated coupled-resonator loops".

My doubt is how to create a setup that understands one RF signal (sweep from 140MHz to 200Mhz) modulated by a signal with fixed frequency (15Mhz) and that has phase 120º  difference between each one. After this, my goal is to plot S parameters and see the transmission from  port 1 to ports 2 and 3. My curent setup use QPSS and QPSP, but the results are not good.

I have the article and I can send to you to read and understand better the problem if you wish.

Best regards.

Parents

  • Eduardo,

    If I used the diode model you gave, I get a similar response to your earlier posts. With the change of the varactor to a capacitor, you now have a completely passive network - it's even more unlikely that this is anything other than a circuit problem (all your components are ideal). I'll leave this for you to debug the design problem with your professor.

    Regards,

    Andrew.

Reply

  • Eduardo,

    If I used the diode model you gave, I get a similar response to your earlier posts. With the change of the varactor to a capacitor, you now have a completely passive network - it's even more unlikely that this is anything other than a circuit problem (all your components are ideal). I'll leave this for you to debug the design problem with your professor.

    Regards,

    Andrew.

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