Microwave Holographic Imaging Using the Antenna Phaseless Radiation Pattern

In this letter, we propose a three-dimensional microwave holographic imaging approach for the cases where the object is in the far zone of the antenna but the measurements are performed in the near zone of the scattering object. Typical applications include concealed weapon detection, through-the-wall imaging, etc. In the proposed approach, the phaseless radiation pattern of the antenna, acquired through measurements, is employed to improve the quality of the image reconstruction results. We demonstrate the performance of the proposed approach via a full-wave simulation example and an experiment and compare the images to the previously proposed holographic imaging approaches.