Microwave diversity imaging using ASAR approach

The formulation, measurement arrangement and experimental results for microwave diversity imaging of a metallic object using the ASAR (antenna synthetic aperture radar) approach are presented. In the measurement arrangement, the test object is illuminated by a horn antenna in the near-field range and the object scattered far field is recorded in a multi-frequency and multi-aspect format. The image is reconstructed based on the ASAR approach. Images of three types of metallic objects, including two thin cylinders, a plate and a scaled 1:72 airplane model are presented. The results of simulation and experiment are shown in a good agreement with the scattering object geometry.