Millimeter wave frequency quadrupler with broadband high-fundamental-wave suppression double-balance self-mixing structure

Abstract

The invention discloses a millimeter wave frequency quadrupler with a broadband high-fundamental-wave suppression double-balance self-mixing structure. The millimeter wave quadrupler comprises a third harmonic frequency multiplication unit, a double-balance ring type mixing unit and three transformers. An input signal is converted into a differential signal by the first-stage transformer, the differential signal is injected into the frequency multiplication unit, and one path of signal is divided as a local oscillator of the frequency mixing unit. And the frequency multiplication unit outputs a differential signal, and third harmonics are injected into a source electrode of the frequency mixing unit as intermediate frequency by a second-stage transformer in a differential-to-differential manner. And the frequency mixing unit mixes the fundamental wave and the third harmonic wave to generate a fourth harmonic wave, the fourth harmonic wave is led out by a drain electrode of the frequency mixing unit in a differential mode, and the third-stage transformer outputs the fourth harmonic wave by a differential-to-single end. According to the invention, the double-balance ring type frequency mixing unit is adopted, the unit has good inhibition degree on local oscillation and intermediate frequency leakage, a fundamental wave and third harmonic wave mixing scheme is adopted, the problem that the frequency tripler with the self-mixing structure generates fundamental frequency mixing products is solved, and the fundamental wave inhibition degree of the frequency tripler with the self-mixing structure is greatly improved.

Description

technical field [0001] The invention relates to a millimeter-wave frequency multiplier and a mixer integrated circuit, in particular to a millimeter-wave quadruple frequency multiplier with a double-balanced self-mixing structure for broadband high fundamental wave suppression. Background technique [0002] The commercialization of 5G mobile communication is in full swing. Compared with 4G mobile communication, it has larger bandwidth, lower communication delay and higher communication rate. According to Shannon's theorem, if the channel capacity of the communication system is to be increased, it is necessary to increase the system signal-to-noise ratio or bandwidth. Decades of research and development in the field of mobile communications in the academic and industrial circles has made radio frequency spectrum resources extremely tight, so they are focusing on the millimeter wave frequency band with relatively rich spectrum resources. Under the same relative bandwidth cond...

AI Technical Summary

Problems solved by technology

Harmonic mixers are usually simple in structure and are usually used to design frequency doublers and frequency triplers; injection-locked mixers have high output power and low power consumption, but the locking range is usually limited and difficult to achieve15 The relative bandwidth of more than %; self-mixing frequency multiplier is composed of a harmonic generation unit and a frequency mixing unit, which can flexibly realize various frequency multiplication coefficients, but its structure is relatively complicated, the design is difficult, and the fundamental wave suppression is relatively difficult. Difference

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