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Recent content by yxue

  1. Y

    S parameter loadpull ADS

    thanks for your help. Actually I want to import the S parameter measurement result into ADS, and do the loadpull to see what is the best performance I can get no matter what output impedace it is. I know it seemed a little wield, but anyway, is it possible to do this in ADS? Thanks you.
  2. Y

    S parameter loadpull ADS

    Hi, everyone. Recently I am testing a Switch, and I have got the S-parameter by VNA. But the performance is not good enough especially S22, because it is not matched to 50 ohm at output( actually we don't need it matched to 50 ohm, it will be connected to LNA). Anyone knows if VNA has a...
  3. Y

    simple cross couple LC tank negative transconductance oscillator

    I am designing a simple cross couple LC tank negative transconductance oscillator. but it doesn't work now. Here is my circuit description: 1. I have tunning the transistor size to make negative resistor equal -2/gm, and the load parrellel resistor is a little large than this value, so it should...
  4. Y

    ground shield connection

    anyone know how to connect a ground shield in HFSS?
  5. Y

    technology file for hfss

    hi, anybody knows how to use the tsmc tech file in the hfss? i wanna simulate a inductor under tsmc process, i need to this tech file? please
  6. Y

    transformer self-resonance frequency

    hi, is there anyone knows transformer's self-resonant frequency? how to simulate it in HFSS? please help me guys!!!thank you
  7. Y

    unable to create child process HFSS

    hi guys, when i run simulation in HFSS, it always like this problem: unable to create child process.....can anybody help me?
  8. Y

    ceramic filter and cavity filter

    can i use the coaxial line to build the resonator?
  9. Y

    ceramic filter and cavity filter

    i wanna design a 6GHz filter with 1GHz bandwidth, which kind of filter structure can i use?
  10. Y

    ceramic filter and cavity filter

    Re: ceramic filter how to use can anyone tell me how to design a ceramic filter? i mean the procedure and software for simulation. thank you
  11. Y

    microwave filter design

    Actually, i wanna design a 6GHz ceramic filter for wireless communication, how can i start? and which software i can use to design?
  12. Y

    microwave filter design

    hi, guys, i wanna design a 6 GHz filter, i am a entry level engineer, is there anyone familiar with this? what kind a simulation software i can use for design, and can you guys explain the whole procedure of designing this kind of filter to me, please? thank you guys.
  13. Y

    LTspice capacitance model

    i add these parameters into my .model file, and than run .op simulation, but it showed that the Cgs, Cgd......are always zero, could you please explain how can make LTspice to calculate these parasitic capacitances?thank you
  14. Y

    LTspice capacitance model

    hi guys, is there anyone familiar with LTspice model file? i wanna create a Level-1 model file for transistor simulation, but i donnot know how to add parasitic capacitance model into transistor, which can be used for frequency response simulation. anyone can help me? please, thank you guys.
  15. Y

    reverse isolation cascode LNA

    could you explain it more detailed, please? thank you so much.
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