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Recent content by ChowChen

  1. C

    Which software is best suited for designing a corrugated horn antenna ?

    corrugated horn cst HFSS need more memory
  2. C

    [Help] Low noise amplifier

    Can you offer THX
  3. C

    [Help] Low noise amplifier

    I design a low noise amplifier in ka-band.I use a MMIc. But the gain of MMIC change in low temperature or in highe temperature.I want to compensate this change. Who can help me THX
  4. C

    [Help] I need a help in use Feko

    +feko +tim I use feko to calculate a time domain field. I set *.pre and *.tim files, then run these files. I get *.aus, *bof and so on. I want to see time field field, but postfeko don't make any graph. Who can help me ? Thanku
  5. C

    a question of gaussian pulse in cst

    Is it time domain?
  6. C

    a question of gaussian pulse in cst

    i want to simlute by a gaussian pulse. the definiton of gaussian pulse is Exp(-j*(t/σ)²). but i don't find this function in excitation signal. I want to know how definite the gaussian pulse in cst? The definition of gaussian pulse is about the time,but in cst ,the parametre of gaussian pulse...
  7. C

    What does Separating Bodies mean in Bool operation?

    a question about HFSS hi,i am study hfss v10 what is mean of 'Separating Bodies' in bool operation? The help is too simple! thanku
  8. C

    A question about new material

    Hi, everybody.I have a question about materials. Now, some new material appear,such as left material,EBG,PBG, chiral material and so on. Who can summarize the differences. I think we have a good discuss
  9. C

    a question about HFSS result

    Hi,asdfaa thank you for u the material of model is pec,so it is not the first case. how to solve the problem of 2.
  10. C

    how to see the time of simulation in cSt

    in cst , i could see the step time ,but i want to know the totale time of simulation. i dont find the menue. who can help me THX
  11. C

    a question about HFSS result

    Sorry, there is a wrong in my question. The result of hfss is that the gain is larger than the directivity. The result of Hfss is wrong?
  12. C

    a question about HFSS result

    I simulate a horn antenna by HFSS.But i find the gain G is smaller than the directivity D. Usually ,G=ε × D , ε is efficiency ,0<ε≤1.
  13. C

    a question about HFSS

    hi, i use hfss to simulate a horn antenna,frequency is 35G Hz,aperture is about 30 mm.But i add a slot in horn. i first set material as pec,then i set material as aluminum. i find the pattern has a different about θ=0, i excite by TM01. Who can explain? Thankx
  14. C

    a question about HFSS

    i have a new question if radiation boundary only contain aperture,then the current of wall will not be calculate.it will effect the field. Its effect is big?
  15. C

    a question about HFSS

    hi, i use HFSS 9.2 to simulation a horn antenna .When i set up radiation boundary by two methods: 1. radiation boundary contain the whole horn antenna (include wave port). 2. radiation boundary only contain the aperture. i find the result by two methods are different . which is right...
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