NEAR-FIELD-TO-FAR FIELD TRANSFORMATION+ FDTD

HELLO

please i need help

I need to put calculation of radiation pattern in my FDTD code.
I read the taflove and sullivan book but its very confusing

Anyone can explain step-by step procedure?or any other advice



thank you

can you give me your fdtd code ??

i think Taflove's book is helpful