Harmonic power detection device

The invention provides a harmonic power detection device, which is characterized in that a first bidirectional coupler is connected with a radio frequency source and the input end of a to-be-detected piece, and the positive output end and the negative output end of the first bidirectional coupler are both connected with a first vector receiver; the second bidirectional coupler is connected with the output end of the to-be-tested piece and the load, and the positive output end and the negative output end of the second bidirectional coupler are connected with the second vector receiver; the two first multiplexers are sequentially connected between the positive output end of the second bidirectional coupler and the second vector receiver, and a first attenuator is arranged on at least one transmission channel between the two first multiplexers; the two second multiplexers are sequentially connected between the reverse output end of the second bidirectional coupler and the second vector receiver, and at least one