wimax antenna 2 l slot by hfss

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cehan

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hi every one...
i am new user of hfss ....i am working on hfss 15 ...i am working on my thesis to design wimax microstrip antenna but i couldn't get any good result ...s11 is 0 - 2 db and return loss 75 db it is so bad and nothing... is this caused by waveport dimensions or another issue like matching..here there is the antenna design in both hfss and on pdf file.

 

Hi!
According to the guide, for an ungrounded coplanar wave guide you should follow this indications:

The waveguide port is well-designed if the fields is symmetric to either side of the center trace, with E fields extending from each side ground to
the trace (or vice versa) in phase.

Hope it helps.
 
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    cehan

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ok it gives some changes. but there are a problems in s11 vswr and radiation...this is my design in hfss 15
 

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