Helical Antenna strange output in HFSS

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baby_1

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Hello
Here is my project in HFSS

but I got very strange output ( it seems the feed only radiates)

and I got (S11)dB=-.002 so S11=10^(-.002/20)=.9999!!!!


Here is my project:
View attachment Project3.zip

what is my mistake?
 

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