Help Radiation pattern "XFDTD"

[Aiiar]

I want to calculate the radiation pattern at a specific frequency
for example 9GHz.
But far-zone data give me a list of frequencies for example (8.88 , 9.02 , 9.11 , 9.23 .....) but I want the radiation pattern at 9GHz exactly .
How to choose the frequency I want

 

[sherinsa]

how do u do? thank u for help me in my equation "new layer" I am not from Menouf I work with Dr Saber Zineo EL-Deen from there are u know him I try to help u in ur problem but i just start in this field
i think this frequencies list is avalibale options for this program becuz i try to change them but i can't get any result I am so sorry when I get any information about this problem I immediately connect with u

 

[AEW]

Change your source waveform from an impulse to a sinusoid at the exact frequency of interest.