Modeling of an Ultra-Wideband antenna array devoted to near-field imaging

This paper presents the mutual coupling analysis in Ultra-Wideband (UWB) antenna arrays devoted to near-field imaging from 1 to 4 GHz. Vivaldi antennas have been designed to build the antenna array. The Method of Moments (MoM) in iterative form is used to find the array impedance matrix and the different near-field patterns. Very strong agreement between the simulated and the measured coupling coefficients, testifies the validity of the modelling of the antenna array. The localization of isolated targets with an accuracy of the order of 2 mm is also demonstrated.