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  1. #1
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    868MHz IFA antenna design in CST

    Hello,
    I design 868MHz IFA antenna. It should be placed in one corner of 160x160mm PCB. Small part of GND under the antenna structure is destinated for antenna GND. On the rest part of PCB will be elements and also GND. So can I set whole surface of PCB as a metal (copper)? Are the simulations done OK? What did I wrong?
    I attach my design and results.
    868MHz.rar

    •   Alt2nd September 2014, 14:40

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  2. #2
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    Re: 868MHz IFA antenna design in CST

    Can somebody check my design?



    •   Alt3rd September 2014, 07:06

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  3. #3
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    Re: 868MHz IFA antenna design in CST

    Without having CST: Ground under the IFA sounds wrong ... there should be no ground below the IFA.



    •   Alt3rd September 2014, 07:33

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  4. #4
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    Re: 868MHz IFA antenna design in CST

    But this is not printed IFA. That is the structure:
    Click image for larger version. 

Name:	Inverted-F_(IFA)-antenna_design.png 
Views:	9 
Size:	8.3 KB 
ID:	108955
    Last edited by konrad_gom; 3rd September 2014 at 09:08.



  5. #5
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    Re: 868MHz IFA antenna design in CST

    Quote Originally Posted by konrad_gom View Post
    But this is not printed IFA. That is the structure:
    Ok, this should work. But from my experience, increased distance between antenna radiator and ground gives an antenna impedance that is easier to match. Have you tried a cutout in the ground below the antenna?



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