A device for determining the polarization of electromagnetic waves, comprising a first array of at least six antennas (1, 2, 3, 4, 5, 6) and at least six power detectors as well as an evaluation unit, each of the six antennas (1, 2, 3, 4, 5, 6) being assigned to exactly one of the six power detectors, the six antennas (1, 2, 3, 4, 5, 6) and the six power detectors being arranged in a planar manner on a surface of a substrate or introduced into the substrate, a first antenna and a first power detector being designed, when the first antenna is irradiated with at least one electromagnetic wave, to detect the power of a horizontally linearly polarized component of the incident electromagnetic wave, a second antenna and a second power detector being designed, when the second antenna is irradiated with the at least one electromagnetic wave, to detect the power of a vertically linearly polarized component of the incident electromagnetic wave, a third antenna and a third power detector being designed, when the third antenna is irradiated with the at least one electromagnetic wave, to detect the power of a left-handed circularly polarized component of the incident electromagnetic wave, a fourth antenna and a fourth power detector being designed, when the fourth antenna is irradiated with the at least one electromagnetic wave, to detect the power of a right-handed circularly polarized component of the incident electromagnetic wave, and a fifth antenna and a fifth power detector being designed, when the fifth antenna is irradiated with the at least one electromagnetic wave, to detect the power of a component of the incident electromagnetic wave having a polarization direction that is linearly polarized at an angle of +45° with respect to the polarization direction of the vertically linearly polarized component of the incident electromagnetic wave, a sixth antenna and a sixth power detector being designed, when the sixth antenna is irradiated with the at least one electromagnetic wave, to detect the power of a component of the incident electromagnetic wave having a polarization direction that is linearly polarized at an angle of -45° with respect to the polarization direction of the vertically linearly polarized component of the incident electromagnetic wave, and the evaluation unit being designed to determine the polarization of the at least one incident electromagnetic wave from the detected powers of the at least six antennas (1, 2, 3, 4, 5, 6). each of the six antennas (1, 2, 3, 4, 5, 6) being assigned to exactly one of the six power detectors, the six antennas (1, 2, 3, 4, 5, 6) and the six power detectors being arranged in a planar manner on a surface of a substrate or introduced into the substrate, a first antenna and a first power detector being designed, when the first antenna is irradiated with at least one electromagnetic wave, to detect the power of a horizontally linearly polarized component of the incident electromagnetic wave, a second antenna and a second power detector being designed, when the second antenna is irradiated with the at least one electromagnetic wave, to detect the power of a vertically linearly polarized component of the incident electromagnetic wave, a third antenna and a third power detector being designed, when the third antenna is irradiated with the at least one electromagnetic wave, to detect the power of a left-handed circularly polarized component of the incident electromagnetic wave, a fourth antenna and a fourth power detector being designed, when the fourth antenna is irradiated with the at least one electromagnetic wave, to detect the power of a right-handed circularly polarized component of the incident electromagnetic wave, and a fifth antenna and a fifth power detector being designed, when the fifth antenna is irradiated with the at least one electromagnetic wave, to detect the power of a component of the incident electromagnetic wave having a polarization direction that is linearly polarized at an angle of +45° with respect to the polarization direction of the vertically linearly polarized component of the incident electromagnetic wave, a sixth antenna and a sixth power detector being designed, when the sixth antenna is irradiated with the at least one electromagnetic wave, to detect the power of a component of the incident electromagnetic wave having a polarization direction that is linearly polarized at an angle of -45° with respect to the polarization direction of the vertically linearly polarized component of the incident electromagnetic wave, and the evaluation unit being designed to determine the polarization of the at least one incident electromagnetic wave from the detected powers of the at least six antennas (1, 2, 3, 4, 5, 6).