Radar Cross Sections of Objects with Simulated Defects Using the Parallel FDTD Method

Comparison of SBR and MLFMM techniques for the computation of RCS of a fighter aircraft

“…The test chamber is a dual reflector setup with a reflector antenna of length 15 ft, width 8 ft, and height 6 ft with the frequency range of up to 20 GHz. Inside the test chamber, the supporting structure on which the aircraft model is mounted is made of Styrofoam which has a very low RCS [5, 7]. The walls of the test chamber are also shielded with broadband RF absorbers, giving an ideal environment for far‐field measurement without EM noise and interference.…”

“…These simulations become more intricate when computing radar cross‐section (RCS) of electrically large objects such as aircrafts, ships, and missiles, as it involves the full wave solution of the electromagnetic field integral [4–6]. To cater for such complexities, various algorithms have been developed over a period of time including finite‐difference time‐domain method [7], method of moments (MoMs) [5], physical optics (PO) [8], and shooting and bouncing rays (SBR) [9]. The choice of these algorithms depends upon few major factors such as target size relative to the radar wavelength, accuracy, and computational time.…”