PURPOSE: To realize a multibeam repeater with a large degree of freedom with simple constitution by using a beam shaping circuit having a switch function.

CONSTITUTION: The matrix type beam shaping circuit E has input terminals N1∼NR and n-set of outputs. The beam shaping circuit E sets a signal path between the input/output optionally. The signal path of the beam shaping circuit E is controlled by a switch control circuit G. An output signal from the beam shaping circuit E is sent to transmission array antenna element groups A1∼An via plural frequency converters F1∼Fn. The multibeam repeater uses a beam shaping circuit having a switch function to shape an optional beam with simple constitution.