I'm trying to simulate an ISAR (inverse synthetic aperture radar) image in CST studio suite.
Firstly, I calculated the radar cross section (RCS) of a target under different frequency and different look angle by asymptotic solver which is based on shooting and bouncing rays (SBR) and got the total farfield date.
Then I performed 2D IFFT on the total farfield data but the ISAR image I got was wrong. I don't know the reason.
Please help