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Recent content by chenchangfu

  1. C

    Question about the Current distribution on antenna

    Hi everyone, Many people use the current distribution to analysis the antenna. Can anyone tell me that what information can we get from the current distribution or in other word how can we analysis the current distribution? Thanks!
  2. C

    Question about the gain of micrpstrip array antenna.

    The ground is not insert to sub,the middle sub is just air sub.
  3. C

    Question about the gain of micrpstrip array antenna.

    Firstly,thanks that you can have time to check my design.Then which part you cannot understand you can tell me and i will explain to you.I will send email to you later.
  4. C

    Question about the gain of micrpstrip array antenna.

    Hi,this is my model,you can have a look and tell me some advice.
  5. C

    Question about the gain of micrpstrip array antenna.

    It is my fault that I do not give you the detail information about the antenna.It is feed by microstrip line with equal power divider.The distance of the array antenna's units at the horizontal direction is 0.8λ while at the vertical direction is 1λ.I adjust the distance between 0.5λ~1.0λ,but I...
  6. C

    Question about the gain of micrpstrip array antenna.

    I have simulated a 4X4 units array antenna,but the gain of the antenna just like this:.Who can tell me the reason? What should I make change about the model?
  7. C

    how to design this antenna

  8. C

    how to design this antenna

    OK ,I want to know how the shorting strip works,I try to adjust the length of it but I cannot make the impedance matching no matter how I adjust it.
  9. C

    how to design this antenna

    This is the picture of the antanna.I just want to know how to choose the width and length of the microstrip.I know the shorting strip plays the role of impedance matching.But it is a pity that I do not know how to adjust it.Is there any formula or experience for the impedance matching of thia...
  10. C

    how to design this antenna

    I read a paper about a 2.4G printed monopole antenna,but I cannot understand how to design the size of the antenna.How to choose the width of the microstrip line? And how to design the shorting strip?Is there any book or formula can I refer?
  11. C

    Questions about microstrip antenna arry~

    Questions about microstrip antenna array~ I designed a 4X4 microstrip antenna array, from the simulated result the gian is 18db and it is just so-so,but the central frequency has a big offset (from 12.5GHz offset to 11.5GHz and the S11 is also worse). I have attemptted to change the distances...
  12. C

    OK,who can tell me how to design a valid microstrip T power divider?

    Yes,I have scaled the model and re-calc the microstrip lines.But I got worse result.
  13. C

    OK,who can tell me how to design a valid microstrip T power divider?

    I changed the substrate high to 62 mils and simulated the model.But it is a pity that I got bigger loss than before.The S21 and S31 was about -5.8dB.
  14. C

    OK,who can tell me how to design a valid microstrip T power divider?

    OK,I will have a try.
  15. C

    OK,who can tell me how to design a valid microstrip T power divider?

    The model is uploaded,you can have a look.
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