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Recent content by jeffreycheng

  1. J

    Cascaded filters and ladder filters

    Thanks for your imformation. It seems I have wasted my life in the univerty. Could you please give me a name of the reference book? Thanks.
  2. J

    Cascaded filters and ladder filters

    Hi, Can anybody told me the defination of cascaded filters and ladder filters. What is the difference between them. is there any documents that dicussed about them. Thanks very much.
  3. J

    Q value is negative of spiral inductor

    Maybe, the frequency is beyond the self resonance and the inductor shows like a capacitor
  4. J

    How can I define a frequency dependent capacitor in ADS?

    model frequency dependent capacitors Yes. But I cannot use the "freq" variable in the expression. I want to do frequecy sweep, how can I use the "freq" in the expression?
  5. J

    How can I define a frequency dependent capacitor in ADS?

    frequency dependent capacitor I need a frequency dependent capacitor in the simulation. But I cannot find a capacitor modle in the ADS. How can I realize it? Thank you.
  6. J

    Question about Momentum post-processing visualization

    Hi I have tried to disable mesh reduction and get a much more dense mesh, and this time the currents' show is more reasonable. Heejing, your method is good,and make the currents more clear. Thank you, my friends.
  7. J

    Question about ADS momentum boundary conditions

    Hi, Recently, I tried to import my momentum proj to CSTMS. In my opinion ,the momentum use a horizontal infinity boundary condition in the simulation. But when the proj was imported to CSTMS, it was shown that there is a box with four perpendicular walls which are perfect E around the struture...
  8. J

    Question about Momentum post-processing visualization

    Deer heejing: I didn't understand what do you mean. Could you explain your method in detail. Thank you.
  9. J

    Question about Momentum post-processing visualization

    I have tried increasing the mesh density, but nothing changed. I have checked the arrow plot. It seems still got same problem.
  10. J

    Question about Momentum post-processing visualization

    In fact, the current arrows show the same results, the current is very little at most of the area of the spiral (small blue arrows) and some discrete strong currents ( Big red arrows) were found at several points along the spiral. It is very weird.
  11. J

    Question about Momentum post-processing visualization

    momentum post process Hi, When I use the post-processing visualizaton to check the current ditribution of a spiral inductor. The figure only show several discreted highlight triangles along the trace. But for another spiral inductor which is litter bigger it can clearly show the coutinuous...
  12. J

    Eddy currents in ADS momentum

    Hi, Does anybody know if the eddy currents will be caculated in the momentum? If yes, how can I check the currents in post-processing visualization? Thank you.
  13. J

    Need help for ADS S-parameter simulation

    ads s-parameter simulation Thank you all. I suppose there are some tools or functions in ADS could turn the components' S-parameters to conponent value and Q.
  14. J

    Need help for ADS S-parameter simulation

    calculating q from y-parameters I have got the S-parameters of a Sprial inductor. How can I get the inductor's Q and value in ADS? Thank you.

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