Three‐Dimensional OAM‐InSAR Imaging Algorithm Based on the ωK Method

Abstract In this study, we propose a novel three‐dimensional (3D) interferometric synthetic aperture radar (InSAR) imaging method based on a uniform circular array to address azimuth coupling and energy defocusing in orbital angular momentum ‐based SAR imaging. The target's instantaneous azimuth angle is directly extracted through interferometric phase processing to effectively overcome the difficulties associated with decoupling terms in conventional methods. Based on this phenomenon, the proposed method integrates ωK imaging with spatial geometric constraints to achieve high‐precision and computationally efficient 3D coordinate reconstruction. Furthermore, we reveal the mechanism behind energy dispersion in imaging and introduce Bessel function phase compensation to reconstruct the ideal signal model, remarkably improving image quality. Simulation results showed that the proposed method ensures imaging accuracy while reducing computational complexity, paving the way for its application in high‐performance 3D radar imaging systems.