Millimeter wave variable gain power amplifier based on switched capacitor array regulation and control

Abstract

The invention discloses a millimeter wave variable gain power amplifier based on switched capacitor array regulation and control. The millimeter wave variable gain power amplifier comprises a signal input end, an inter-electrode matching transformer, a differential amplification circuit and a balun which are connected in sequence. The interpolar matching transformer realizes impedance matching between an input signal of the millimeter wave variable gain power amplifier and an input signal of the differential amplification circuit. The differential amplification circuit comprises a pair of amplification units with consistent circuit structures, each amplification unit comprises a common-emitter common-base amplification circuit, a phase compensation inductor and a switched capacitor array,the phase compensation inductor is connected in series in the middle of the common-emitter common-base amplification circuit, and a common-base stage of the common-emitter common-base amplification circuit is connected with the switched capacitor array; and the balun converts a differential output signal of the differential amplification circuit into a single-ended output signal. According to themillimeter wave variable gain power amplifier, the switched capacitor array is supplemented in the differential amplification circuit, so that the aim of keeping high linearity of the millimeter wavevariable gain power amplifier under the condition of gain change is fulfilled.

Description

technical field [0001] The invention relates to the technical field of millimeter waves, in particular to a millimeter wave variable gain power amplifier based on switching capacitor array control. Background technique [0002] In order to meet the high data throughput requirements of the next generation wireless mobile communication system, the working frequency band of the fifth generation mobile communication (5G) is extended to a higher frequency band. At present, 5G low-frequency bands have begun commercial use in my country. Millimeter-wave frequency bands such as n257 (26.5~29.5GHz) and n258 (24.25~27.5GHz) have the characteristics of large bandwidth, clean spectrum, and low interference, and are used as subsequent extended frequency bands for 5G. The 5G millimeter wave spectrum in my country has approved 24.75~27.5G and 37~42.5GHz as experimental frequency bands. [0003] At present, in the hybrid multi-beam architecture of 5G millimeter wave commercial use, the RF...

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Problems solved by technology

[0004] Technical purpose: Aiming at the problems of linearity deterioration and phase fluctuations in millimeter-wave band active variable gain amplifiers in the prior art, the present invention discloses a millimeter-wave variable gain power amplifier based on

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