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Recent content by viper_iv

  1. V

    high order modes of microstrip

    Does anybody know where (book) I can find a more theoretical explanation on why 1/10 of the wavelength is the reference?
  2. V

    How to start learning Embedded Linux?

    Do you mean "Linux Kernel Development" by Robert Love (Novell) or "Linux Device Drivers" by Jonathan Corbet, Alessandro Rubini, Greg Kroah-Hartman (O'reilly)?
  3. V

    [ADS] Voltage Multiplier and its input impedance in ADS ??

    You can refer to this thesis for some support http://ria.ua.pt/handle/10773/8717 But I believe you won't get that much increase in efficiency/output voltage after 3 stages
  4. V

    Antenna & software simulation and designer

    Check this thread for the price. https://www.edaboard.com/threads/166061/ There is no freeware that I know of.
  5. V

    [ADS] Voltage Multiplier and its input impedance in ADS ??

    The configuration you have is working for me (I get a 1.08 V signal at the output) However, you should only use the Harmonic Balance and Large-Signal S parameters solvers for this case (not AC)
  6. V

    Axial Ratio Measurements

    Check these Matlab scripts, they have a function to calculate directly the axial ratio (if I remember correctly). http://labrf.av.it.pt/Data/Manuais%20&%20Tutoriais/40C%20-%20Antennas/Measurements%20Kits%20Antennas/Scripts%20MatLab/
  7. V

    how to plot antenna gain vs frequency in dbi using HFSS

    dBi is the Gain (in dB) of you antenna related to that an isotropic radiator (which.... doesn't exist in practice). I believe you can simply consider the Gain in dB you get in HFSS as if it were in dBi. On the other hand: - dBm and dBW are relative to Power (not Gain) - dBc stands for decibels...
  8. V

    [ADS] Voltage Multiplier and its input impedance in ADS ??

    1 and 2) are you sure about the 0.95 GHz working frequency and 3.3 Farad capacitors? Note that your Source is working at 0.95 Hz while your HB simulation is running at 0.95 GHz 3) There is no ADS Design Guide for Voltage Doublers (that I know of) 4) If you want to know the input impedance...
  9. V

    Axial Ratio Measurements

    Which value exactly did you measure in the EMC Chamber? e.g. E field magnitude and phase in the horizontal or vertical plane.
  10. V

    how to enhance microstrip patch antenna gain

    You can also try to use a parasitic patch over your own to enhance the gain. Check: "Enhanced Gain Patch Antenna With a Rectangular Loop Shaped Parasitic Radiator" Yildirim, B. and Cetiner, B.A. Antennas and Wireless Propagation Letters, IEEE (Volume:7 ) Page(s): 229 - 232 25 April 2008
  11. V

    design of conformal antenna

    you can simply refer to this tutorial https://www.cst.com/Applications/Article/Microstrip-Patch-Array-Design and for the equations to dimensions the antennas check the book Antenna Theory by Balanis.
  12. V

    [SOLVED] Why this simple microstrip line in CST & HFSS has different response?

    The results might shift a bit given the way you define the excitations on each simulator and given they use different types of solvers (HFSS uses Finite Element Method and CST uses Finite Integration Technique). Also, the results will shift depending on the mesh definition (especially in CST if...
  13. V

    design of conformal antenna

    Hello, gupta Your post is a little vague, still you can try and design a simple phased antenna patch array, vary the shape of the substrate to your objective and you will get some insight on the matter. Hope this helps.
  14. V

    Microstrip LC resonator

    Dear all, I am trying to design a series LC resonator with a interdigital capacitor in series with a circular planar inductor. When I simulated the S-parameters in the S11 I get the variation of the inductor and on the S22 the response of the Capacitor, and not the behavior of the resonator I...
  15. V

    Impedance Measuring of a 24 GHz Rectifier

    Did you simulate and measured the circuit considering the same input power? Because if you are using Schottky diodes then their input impedance will not only vary with frequency but also with the input power available.

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