A 3-D SAR Imaging Method Based on 2-D Wavefront Modulation

Synthetic aperture radar is a widely used technology. However, current 3D imaging algorithms either require a large number of passes or have limited elevation resolution due to carrier size. In this paper, a 3-D SAR imaging method based on 2-D wavefront modulation is proposed. The method achieves the same range and azimuth resolution as traditional SAR, while also obtaining high elevation resolution with limited carrier size and number of flights. The wavefront modulation function requires a smaller correlation coefficient between two elevation angles with a larger difference. Finally, a simulation is conducted to demonstrate the effectiveness of the proposed method.