Reflected near E field simulation from Metal 1cm dia sphere using Dipole Antenna

Hi,

Currenntly, I am traying to simulate MIMO array using Feko... a mimo antenna consists of 4 transmitters positioned at outer (2 right outer side, 2 left outer side), 8 receivers positined inner... .
by processing the data using Range migration algorithm, I would lke to reconstruct the sphere reflectivity function.

Now I try to make a near field (which is received by receivers dipole) simulation ... My method is that I draw a line to obtain near field (this field calculation is performed separately for each transmitter),

then using the obtained near field data, I reconstruct the image

Unfortunately, I can not reconsture the image succesfully.

I know and proof that my imaging algorithm works well. I sucesfuly reconstruted an image using the data calculated in MATLAB . But I cannot reconstruct the image using the data calculated in FEKO.

I suspicious that my E field calculation is wrong... I am wondering whether or not I wrongly do something or I miss some critical point in FEKO...
Feko parameters are here


simulation shoud be simple...but I could nt...

Already thank you very much for your helps...

with my best wishes...

Harun