uwb antenna design output deviation...need help in ie3d

i am new to ie3d...pls help me...
i have designed monopole antenna..i am getting correct output in the range of 3 to 9 Ghz...but in 9 to 10 Ghz i am not getting correct output...
pls check the whether i have given port properly ?


Thanking you,
S.theepak

i got correct answer after using vertical polarized feeding...