RF Tomography: Self calibration of distributed RF sensors

Ground-based RF Tomography requires accurate calibration to ensure that acceptable image quality is achieved. A calibration scheme was presented in [1], valid only when radiators are approximated as Hertzian dipoles. In this work, a generalized calibration procedure that is valid for most antennas is presented. The calibration is achieved by placing a known target slightly outside the area under observation. Experimental results and discussions are presented.