Doherty power amplifier and implementation method thereof

Abstract

The present invention discloses a Doherty power amplifier and an implementation method thereof. A peak amplifying circuit of the Doherty power amplifier comprises a radio frequency switching circuit configured to control turn-on of the peak amplifying circuit; wherein a last stage carrier amplifier of a carrier amplifying circuit of the power amplifier uses a HVHBT device, and a last stage peak amplifier of the peak amplifying circuit of the power amplifier uses a GaN device. The present invention avoids the shortcoming when the peak branches in the Doherty power amplifier are turned on ahead of time, decreases power consumption of the peak amplifier and improves the batch efficiency of the whole Doherty power amplifier.

Description

technical field [0001] The present invention relates to the technical field of communication, and more specifically, to a multi-combination power amplifier and its realization method. Background technique [0002] With the continuous popularization of green environmental protection and low-carbon economic concepts in the world, operators have higher and higher requirements for the reduction of power consumption of wireless communication systems. In a wireless communication system, the radio frequency power amplifier (power amplifier for short) in the base station equipment is one of the core modules of the whole system, and the important index of the radio frequency power amplifier is the power amplifier efficiency. Data analysis shows that in the entire base station equipment, the energy consumption of the power amplifier accounts for about 60% of the total energy consumption. Improving the efficiency of the power amplifier will reduce the power consumption of the base stat...

AI Technical Summary

Problems solved by technology

This is because the peak amplifier in the Doherty power amplifier works in class C, and the peak amplifier is not turned on when the small signal is working. When the amplified signal gradually increases from small to a certain level, the carrier amplifier begins to compress. It can be turned on normally, otherwise it will affect the improvement of the linearity of the power amplifier by DPD

The turn-on of the class C amplifier is gradually turned on as the signal increases from small to large, so in practical applications, in order to fully turn on the peak amplifier when the carrier amplifier starts to compress, it must be advanced at a lower level. conduction, which increases the power consumption of the peak amplifier, thereby reducing the efficiency of the entire power amplifier

[0011] 2) The carrier amplifier and peak amplifier of the existing Doherty power amplifier are all laterally diffused metal oxide semiconductor (LDMOS) power amplifier tubes, which have disadvantages such as low operating frequency, narrow operating bandwidth, low efficiency, and high power consumption.

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