A system and method for positioning a transponder

A system for positioning a transponder, the system comprising an array of antennas at least two spaced antennas each other (120, 130, 150, 170) coupled to a common generation unit and switching (140), said unit being configured generating and switching to generate a periodic signal (TS) and switching the signal between said at least two antennas constituting a positioning signal transmitted to the transponder; the system comprising a receiver for receiving a returned signal (RS) and a phase difference estimator (145) coupled to the receiver and operable to measure phase differences between portions of the return signal; the system further comprising positioning a utility (180) coupled to said phase difference estimator and configured to determine the position of the transponder relative to the positioning system.