A Microwave Imaging Sensor Composed of a Dielectric-Loaded Double-Polarized Horn Antenna

Inverse scattering problem is a technique for finding the complex permittivity of an imaged object such that the analysis results of an imaging system, which includes the imaged object, match the experimental scattering field results. Changes in scattering caused by small lesions in tissue, which is a lossy medium, are insignificant. In contrast, the current technology cannot perfectly model the imaging model, and non-negligible analysis errors occur. For the inverse scattering problem, a highly sensitive antenna such that the variation of the scattered field caused by the perturbation of the voxel group greatly exceeds the analysis error is required. In this study, a highly sensitive antenna for early breast cancer detection is proposed; then, a new imaging sensor using this antenna and image reconstruction algorithm is introduced.