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Recent content by icfarmer

  1. I

    transistor model for predicting intermodulation

    Generally,foundry provides G-P or VBIC model for GaAs HBT. But the measured results show both models can not predict IMD performance accurately. So the design can not be guaranteed especially in designing high linearity amplifier with HBT process. Most of such amplifiers employ predistortion...
  2. I

    transistor model for predicting intermodulation

    sorry,what I use is GaAs HBT.Bsim is not suitable for this device.
  3. I

    transistor model for predicting intermodulation

    agilenthbt there are many transistor models,but not all can predict intermodulation(such as IMD3) accurately.which model is capable of predicting IMD3 accurately?could anyone please give me suggestion?
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    How to optimize large transistor layout for RF PA

    heat dissipation have to be considered for PA
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    Types of transistor models and differences between them

    Re: Transistor Model which model is capable of predicting the intermodulation performance?
  6. I

    modelling a real transistor in ADS

    which transistor model do you use?
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    MIM capacitor modelling?

    Is MIM scaling capacitor model suitable for small capacitor?At what condition the fringing capacitor is not negligible?
  8. I

    questions in receiver nonlinearity specs for mobile WiMax

    Re: questions in receiver nonlinearity specs for mobile WiMa what is the frequency band of Wimax?What requirements are needed for PA in Wimax?
  9. I

    RF PA package problem

    I'm designing a RF PA module with LGA package.which laminate is suitable for RF PA packing in 900MHz,1800MHz when the max output power is 1W? What experiments should be done for testing the reliability of the module?
  10. I

    Who is the best RFIC simlator?

    ADS is a not bad tool,though some simulations are not very accurate.mom simulation is a powerful tool for high frequency simulation.
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    which PCB is suitable for RF PA packaging?

    RF PA output power is about 1W,frequency is 1900MHz,LGA package.which PCB is suitable for this package?
  12. I

    Output impedance of PA

    load pull contours are different when the PA input power is different.
  13. I

    Bias of the diodes in RF through Fiber transmission

    Re: RF thro Fiber i recommend a company--Maxim, who has many products for O/E and E/O conversion.the web site is www.maxim-ic.com. good luck!
  14. I

    How to plot fmax, ft when sweeping transistor current in LNA

    Re: How to plot fmax, ft when sweeping transistor current in it doesn't need impedance matching.50 Ohm term is enough. ft and fmax tell us how high frequency the transistor can handle. they are of no dependence on impedance matching.
  15. I

    [SOLVED] PMD fundamentals: Polarization mode dispersion in optical fi

    PMD fundamentals: Polarization mode dispersion in optical fibers J. P. Gordon and H. Kogelnik‡ Crawford Hill Laboratory, Bell Laboratories, Lucent Technologies, Box 400, Holmdel, NJ 07733 Contributed by H. Kogelnik, February 2, 2000 This paper reviews the fundamental concepts and basic theory of...
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