Doherty power amplifier and implementation method thereof

Abstract

The invention discloses a Doherty power amplifier and an implementation method thereof. The Doherty power amplifier comprises a carrier amplifier circuit and a peak amplifier circuit; the peak amplifier circuit is provided with a radio-frequency switch for controlling breakover of the peak power amplifier in the peak power amplifier circuit; partial or all carrier power amplifiers in the carrier amplifying circuit adopt GaN apparatuses, partial or all peak power amplifiers in the peak amplifier circuit adopt LDMOS apparatuses. The Doherty power amplifier overcomes the shortage of advanced breakover of peak branches in the Doherty power amplifier, and reduces power consumption of the peak power amplifier; meanwhile, the power consumption of the carrier amplifier occupies a large proportion of that of the Doherty power amplifier, the carrier amplifier in the invention adopts HVHTB apparatuses with efficiency rather higher than the LDMOS apparatus, thus the efficiency of the entire power amplifier is greatly improved.

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 power 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 power amplifier, thereby reducing the efficiency of the entire power amplifier

[0011] 2) The carrier power amplifier and peak power amplifier of the existing Doherty power amplifier use 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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