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Recent content by Lathas

  1. L

    Pulsed DC input in Sentaurus TCAD simulation

    How to apply a pulsed dc input instead of a constant dc voltage to generate dc characteristics in Sentaurus TCAD simulation.
  2. L

    BandtoBand model for metals

    Which model need to be used for band to band tunneling when two metals are used for a contact in Sentaurus TCAD?
  3. L

    Defining two material for gate in Sentaurus TCAD

    How can I define single gate electrode, when gate material is composed of two material with different barrier values?
  4. L

    [SOLVED] PIN diode matching in HFSS

    I have designed a switchable antenna in HFSS. But when I gave lumped RLC in the switch position. On state Rs=2ohm and Ls=0.5nH, the matching is gone and it looks like the signals are getting reflected at the RLC. How to solve this?
  5. L

    separte dc ground in tunable filter

    For tunable filter with varactors, is it ok to use a separate dc ground (for biasing varactor) than connecting it directly to RF ground?
  6. L

    Antenna gain for silicon IC

    I have seen many papers with antenna gain for on chip silicon based antenna in negative dB values? Why is it so? How is the antenna useful without a positive gain?
  7. L

    S-parameters from Coventorware

    Is there any way to deduce s-parameters of RF MEMS switch simulation in Coventor?
  8. L

    Filter synthesis using Butterworth or Chebyshev

    When a filter is designed, how does one choose whether to compare it to Chebyshev or butterworth prototype element values for coupling and Q determination? Some papers mention Butterworth element values to determine Q and coupling, while others use Chebyshev.
  9. L

    Identify the radiating edge of a multifaced patch antenna

    How can I identify which edge of the antenna is radiating for a particular resonant frequency, especially when multiple edges are there for a microstrip patch antenna? Is there any condition that need to be satisfied to decide which edge is supposed to radiate with respect to the position of...
  10. L

    Electromagnetic Bandgap (EBG) and SIW

    EBG is explained with graphs in **broken link removed**. What you discussed above is clearer now. Thanks! - - - Updated - - - Can EBG substrate be considered a metamaterial?
  11. L

    Gnd connection for chip inductor

    Can I take Rdc = re(1/Yin) at 0hz in this design?
  12. L

    Gnd connection for chip inductor

    Thanks! Should this be a ring/closed loop itself? How do you choose the width of the gnd conductor or distance of gnd ring from the inductor?
  13. L

    Gnd connection for chip inductor

    Looking at the example given by HFSS manual, I can see a ring around the inductor acting as a gnd reference for the port, but it is not connected to the actual gnd underneath(below the silicon), so how does it work? Should the ring be connected to the gnd below in the actual implementation?
  14. L

    Electromagnetic Bandgap (EBG) and SIW

    In one perspective that is right. But what I understand is that EBG suppress the propagation and confine it to region in between to form SIW? Refer to the paper: Hill, Michael J., Richard W. Ziolkowski, and John Papapolymerou. "A high-Q reconfigurable planar EBG cavity resonator." Microwave...
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    Electromagnetic Bandgap (EBG) and SIW

    What is the difference between electromagnetic bandgap(EBG) and Substrate integrated Waveguide (SIW)?
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