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Recent content by OkTa

  1. O

    Radiation pattern mismatch

    Hi all; I matched S11 in paper and hfss simulation with the aid of sweetchoto. But I have problems with radiation pattern. When I draw pattern in xy xz yz plane in hfss, they have different cros-pol amplitude I do not understand why. So Shape of pattern like in paper but cros pol component have...
  2. O

    HFSS and paper antenna design mismatch

    Hi all; I matched S11 in paper and hfss simulation with the aid of sweetchoto. But I have problems with radiation pattern. When I draw pattern in xy xz yz plane in hfss, they have different cros-pol amplitude I do not understand why. So Shape of pattern like in paper but cros pol component have...
  3. O

    HFSS and paper antenna design mismatch

    Thanks a lot sweetchoto for helping. Your help very supportive to understand simulation in HFSS. I will try probe fed. if I am in trouble with probe, I am asking you again. Thanks :)
  4. O

    HFSS and paper antenna design mismatch

    Thanks for all support I understand many things:) I didn't find any difference with lumped port with my simulation except copper-pec and box-sheet thing. Probably this cause. Lumped port and wave port solutions are slightly different it seems normal. If I desing probe feed I have two questions...
  5. O

    HFSS and paper antenna design mismatch

    Hi sweetchoto, I simulate with copper box and results same :). I think in reality we use not a sheet of course approximately sheet but I think the box is very thin 0.1mm in my design. In reality we use copper it has height this is my key idea. if we use sheet instead of box , is this an...
  6. O

    HFSS and paper antenna design mismatch

    Thanks alot :) This knowledges very helpful for me. I have a one question if I use copper box instead of copper sheet, does it cause big change in simulation? and in box situation am I define boundary condition?
  7. O

    HFSS and paper antenna design mismatch

    Hi to all, @sweetchoto: Thanks for grate helping :). I understand lumped port and wave port results same but I wonder where is my problem in lumped port simulation. I am new in HFSS and I learn very much in this discussion so if you post your design file I will learn lots of thing about them :).
  8. O

    HFSS and paper antenna design mismatch

    My lumped port solution in . In file I do not save output file but for 1.9 - 3Ghz; 2.42 - 2.76 Ghz below -10dB and in resonance freq. -27dB. Also I have two question; 1.Why do you define integration line on port? 2.I simulete with box instead of rectengular for pec parts and air box in your...
  9. O

    HFSS and paper antenna design mismatch

    Thanks a lot :) but I have few question. 1. How do you define waveport in internal of airbox ? 2.Why do you change name Msfeed and T? Do you change any parameter in here? 3.How do you define air box size ? (lambda/4 etc.) 4.I tried to perform simulation with lumped port because wave port didn't...
  10. O

    HFSS and paper antenna design mismatch

    Yes thanks for results but I do not understand my problem is. Which is your air box size and what do you use waveport and dimension? if it possible can you send me a design file?
  11. O

    HFSS and paper antenna design mismatch

    hi, with revision of simulation, I concluded that resonant freq 2.6 Ghz and below -10dB bandwidth shifted 30Mhz according to orginal solution. My problem was air box dimension and I fixed it but ı do not find why does simulation 30 Mhz shift in S11 occur? What is my problem? please help me:(...
  12. O

    HFSS and paper antenna design mismatch

    I am waiting too :) Also I tried to simlate big radiation box (lamda/4 every) radiation surface I found 2.4 Ghz in resonant but for big radiation box ,I expand box alog x axis (Not radiation surface in here) and I used lumped port. HFSS result meet paper's result. However I don't understand...
  13. O

    HFSS and paper antenna design mismatch

    thanks but I do not understand that radiation box is lambda/4 far away from any radiation surface antenna solution freq is 2.4Ghz radiation box lamba/4=37.5mm. So why radiation box is small? I tried bigger air box (100mm every radiation surface) but results same :(
  14. O

    HFSS and paper antenna design mismatch

    hi myazdi83, I found this result in driven terminal and my design. Problem in article this antenna has a resonant frequency in 2.4 Ghz and my design and your design has not resonana frequency over there.
  15. O

    HFSS and paper antenna design mismatch

    hi myazdi83 I tried project in driven mode but it did not work I defined integration line properly but it did not work too. driven mode and driven terminal mode did not look differrent in terms of s11, but they have different port impedance in port only solution. Why am I conduct this antenna...
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