Development of UWB Microwave Mammography with Multi-Polarization

A multi-channel phase calibration is simplified by installation of direct-conversion receiver into ultra-wideband (UWB) microwave mammography system for early breast cancer screening. The system works as a multi-channel frequency-modulated (FM) interferometer at the frequency range of 1 to 6 GHz. The phase calibration method under construction will be useful to get precise medical images beyond the diffraction limit.