Phase shifter with linear polarization and a resonating length which can be varied using mem switches.

-lag cell (CD), for a network of reflector antenna, defined by a length characteristic resonance, characterized by comprising a flat resonance structure containing a upper patch (PS) placed substantially parallel to a lower ground plane (PM1) to a selected distance, and it comprises, in at least a selected location, at least one micron electromechanical device of MEMS type (DC, DC ') controlling the length characteristic resonance of said upper patch (PS), the MEMS device and it can be placed in at least two different states allowing and prohibiting respectively the establishment of a short-circuit intended to vary said length to resonance, so as to vary the phase shift of a wave to reflect presenting at least one linear polarization.