Phase-controlled array antenna, comprising at least four phase-controlled antenna elements connected via at least one feed network, wherein a phase-controlled antenna element consists of • a waveguide radiator having a signal output coupling and/or input coupling, • a phase shifter fitted rotatably in the waveguide radiator and containing a mount and at least two polarizers (5a, 5b), wherein each of the at least two polarizers (5a, 5b) can convert a circularly polarized signal into a linearly polarized signal in order to transform a wave having circular polarization and a phase angle φ that is incident in the waveguide radiator into a wave having linear polarization by means of a first polarizer of the at least two polarizers (5a, 5b) of the phase shifter and to transform said wave having linear polarization back into a wave having circular polarization by means of a second polarizer of the at least two polarizers (5a, 5b) of the phase shifter, • a connection element, and • a drive unit fitted on a carrier and connected to the phase shifter via the connection element in such a way that the drive unit can rotate the phase shifter about an axis of the waveguide radiator, such that upon rotation of the connection element and thus also of the two polarizers (5a, 5b) by an angle Δθ, the polarization vector of the linear wave between the two polarizers (5a, 5b) is correspondingly rotatable by the angle Δθ in a plane perpendicular to the direction of propagation and the wave having circular polarization thus has a new phase angle of φ + 2 Δθ, and • a computing unit, which is connected to the drive units of the phase-controlled antenna elements via control lines and sets the rotation of the respective phase shifters. • a waveguide radiator having a signal output coupling and/or input coupling, • a phase shifter fitted rotatably in the waveguide radiator and containing a mount and at least two polarizers (5a, 5b), wherein each of the at least two polarizers (5a, 5b) can convert a circularly polarized signal into a linearly polarized signal in order to transform a wave having circular polarization and a phase angle φ that is incident in the waveguide radiator into a wave having linear polarization by means of a first polarizer of the at least two polarizers (5a, 5b) of the phase shifter and to transform said wave having linear polarization back into a wave having circular polarization by means of a second polarizer of the at least two polarizers (5a, 5b) of the phase shifter, • a connection element, and • a drive unit fitted on a carrier and connected to the phase shifter via the connection element in such a way that the drive unit can rotate the phase shifter about an axis of the waveguide radiator, such that upon rotation of the connection element and thus also of the two polarizers (5a, 5b) by an angle Δθ, the polarization vector of the linear wave between the two polarizers (5a, 5b) is correspondingly rotatable by the angle Δθ in a plane perpendicular to the direction of propagation and the wave having circular polarization thus has a new phase angle of φ + 2 Δθ, and • a computing unit, which is connected to the drive units of the phase-controlled antenna elements via control lines and sets the rotation of the respective phase shifters.