Local oscillator frequency multiplier circuit with phase modulation function

The embodiment of the invention provides a local oscillator frequency multiplier circuit with a phase modulation function. The invention is applied to the radio-frequency integrated circuit field. The circuit comprises a first phase modulation module, a second phase modulation module and a third phase modulation module which are connected in sequence, wherein the first phase modulation module comprises a first phase modulation unit, a matching circuit, a first amplifier and a frequency multiplication unit which are connected in sequence; the second phase modulation module comprises a second amplifier, a second phase modulation unit and a third amplifier which are connected in sequence; and the third phase modulation module comprises an orthogonal unit, a fourth amplifier, a fifth amplifier, a sixth amplifier, a seventh amplifier, a third phase modulation unit, a fourth phase modulation unit, a first frequency mixer and a second frequency mixer. The circuit can calibrate the phase between chips and the orthogo