Millimeter wave transmitter and time modulation power amplification circuit thereof

Abstract

The invention discloses a millimeter wave transmitter and a time modulation power amplification circuit thereof. The time modulation power amplification circuit comprises cascaded amplification units. Each amplification unit comprises a lower transistor whose gate is coupled with a modulation signal and whose first pole is connected with a common terminal; the first electrode of the upper transistor is connected with the second electrode of the lower transistor, and the second electrode is connected with the power supply end through a load; the input end of the power matching network is connected with the second electrode of the upper transistor, and the output end of the power matching network is used for outputting amplified signals; for the first-stage amplification unit, the grid electrode of the upper transistor is coupled with a central signal, and the grid electrode of the upper transistor of each subsequent amplification unit is coupled with the output end of the power matching network of the preceding-stage amplification unit. The cascaded amplification units have very high circuit rollback efficiency; the time modulation power amplification circuit can restrain higher harmonics, can restrain third and fifth harmonics when forming a four-channel or eight-channel drive circuit, and improves the space beam efficiency.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a millimeter wave transmitter and a time modulation power amplifying circuit thereof. Background technique [0002] Modern communications are often modulated by signals with a high peak-to-average ratio. For example, OFDM coding generally has a power peak-to-average ratio of 12dB. General high-frequency power amplifiers are mainly designed for saturation power to ensure that the system has the maximum output efficiency when outputting saturated power. When the fallback signal is output, that is, when the required output power is less than the saturated output power, the overall efficiency of the system is greatly reduced. The present invention aims at inventing a time-modulation-based fallback method suitable for integrated millimeter wave and above frequency ranges to improve the overall efficiency of an array or a single transmitter. [0003] Traditional methods include...

AI Technical Summary

Problems solved by technology

Due to the limitation of the bandwidth of passive devices on the chip, these fallback methods cannot work efficiently in the high millimeter wave band

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