Analysis of near-field scattering from ship target on rough sea surface irradiated by horn antenna

Shooting and Bouncing Ray Method (SBR) combined with the Physical Diffraction Theory (PTD) was adopted to calculate the near-fields composite scattering between target and sea surface. The radiation field of the horn antenna was simulated and used as the incident wave. The influence of the distance between composite model and antenna, wind speed as well as the antenna beam on the near-field scattering characteristic was studied from near-field RCS. The calculated results show that the characteristics of the near field are more complex, the incident wave cannot be regarded as plane wave and the effects of the antenna pattern on near-field scattering cannot be ignored.