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Recent content by johnnykhor

  1. J

    How to connect DC Bias Circuit to Varactor Diode..??

    hi there, is it possible to attach a figure for better illustration?
  2. J

    [HELP] how to tranfer the hsff design to circuitcam

    Re: who export dxf circuitcam Hi there, although your post is quite some time ago, but i hope my answer helps others. I'm also using HFSS version 8, and i export my design in the form of .SAT (version 5), then i import into CST. then export in GERBER file using CST. ** REMEMBER: delete...
  3. J

    Improving impedance of circular patch

    anyone looking into my case?
  4. J

    Improving impedance of circular patch

    hi everyone, my question is how to improve the impedance of circular patch if i'm using probe feeding. i've come across with the idea of feeding position, is there any conventional equation?? or i need to try all of them? thank you very much in advance!! any comment will be appreciated.
  5. J

    Question on Permittivity

    Thanks for your reply. Now i am more confidence on what am i doing.
  6. J

    Question on Permittivity

    I have tried a few substrate with different relative permittivity, and now i have one question about it. Does relative permittivity affect our design? (other than dimension) is higher relative permittivity can give us better performance? and lastly, is there any standard/rules on which relative...
  7. J

    Finding LC values of 1-port microstrip antenna using ADS ?

    Have you gotten the answer yet? as i'm facing the same problem as yours.
  8. J

    Information needed for Patch coupler

    hi everyone! I'm now going to start a project which requires knowledge of patch coupler. can someone provide me some related links or information? thank you very much!!
  9. J

    exporting S-parameters from HFSS to ADS?

    hi everyone, I tried to export my S-param as well, but it pops up a message saying that i have to renormalized to 50 ohm?? izzit because of i did de-embed??
  10. J

    Microstrip - I need inductor 0.07nH and 1.37nH at 2.4Ghz

    Re: Microstrip Inductor hi there, i was wondering, how could you measure the inductance of microstrip line? because i am doing the same thing a you, but i'm in reverse, i need to convert microstrip line back to inductor or capacitor (component)
  11. J

    How to test a matching circuit

    hi everyone, i have quite similar question as kellyza mentioned. However, I'm my question is: how to convert a matching circuit (microstrip-open circuited stub) into lump element. my purpose in doing this is because of saving space. thx in advance for replying.
  12. J

    RF circuit routing on open-circuited matching stub

    i'm designing a Power amplifier using AWR. and i dont know which way of laying out my circuit is the correct way. can someone enlighten me pls? i will attach my matching circuit as well. thx in advance!!
  13. J

    P1 dB and 3-dB back off measurement for power amplifier

    hi there, i'm designing a power amp as well. AWR is my simulation software. may i ask how do u plot them out? could u pls share those steps? thanks in advace!

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