Target scattering coefficient measurement system and method

The traditional RCS measurement needs to meet the far-field conditions or special equipment, which has high cost and many limitations. In order to overcome these drawbacks, it is a feasible method to obtain far-field RCS through near-field measurement. In this article, we design a two-dimensional scanning system, which can obtain the nearfield three-dimensional scattering coefficient image of the target. Then, we adopt a near-field to far-field transformation method based on spherical wave compensation and back projection to acquire far-field RCS. Finally, some simulation and experimental results show the effectiveness of the system and the developed approach.