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double side bow tie antenna simulation in HFSS

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peterki

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bow-tie antenna hfss

hi all

i modelled the antenna in hfss and run it, but somehow the result is not what i expected, with a S11 around -2db, something must be wrong

the antenna is already published and i modelled exactly according to the dimension. it's a UWB antenna with bw 3.1g to 10g

i went thru the design for several times however the result is the same

could some one tell me what's wrong with my design?? i doubt it's due to the port coz i assigned a lumped port instead of wave port which i think is much easier.

might be due to solution frequency, setup , etc . juz not sure
i attached the zipped file
 

hfss bowtie

i found out whats wrong with it

it has nothing to do with the setup, the patch in the ground side should be in the other direction.
 

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