Broadband passive frequency multiplier and chip

The invention is applicable to the technical field of monolithic microwave integrated circuits, and provides a broadband passive frequency multiplier and a chip, the broadband passive frequency multiplier comprises a first transformer balun, a first amplifier, a second amplifier, a frequency multiplication unit and a second transformer balun, the broadband of the broadband passive frequency multiplier is realized by using the transformer balun, and the frequency multiplication unit is used for amplifying the broadband of the broadband passive frequency multiplier through a phase cancellation technology. According to the invention, even harmonics of the signals are output, odd harmonics of the signals are suppressed, and then the signals are synthesized into required second harmonic signals through the balun of the second transformer, so that even harmonics with higher order are suppressed, and the frequency spectrum purity of the signals is improved. According to the broadband passive frequency multiplier pro