Output matching module and Doherty power amplifier

Abstract

The invention provides an output matching module and a Doherty power amplifier. The output matching module comprises a first inductor, a second inductor, a first passive electronic component, a second passive electronic component, a third passive electronic component, a first blocking capacitor and a second blocking capacitor, wherein one end of the first inductor is connected with the drain electrode of a main path tube core, and the other end of the first inductor is connected with one end of the second passive electronic component; the other end of the second passive electronic component is grounded through a first blocking capacitor; one end of the second inductor is connected with the drain electrode of an auxiliary path tube core, and the other end of the second inductor is connected with one end of the third passive electronic component; the other end of the third passive electronic component is grounded through a second blocking capacitor; the other end of the second passive electronic component or the third passive electronic component is connected with a bias power supply; and one end of the first passive electronic component is connected with the other end of the first inductor, and the other end of the first passive electronic component is connected with the other end of the second inductor.

Description

technical field [0001] The embodiments of the present application relate to the field of microwave power amplifiers, in particular to output matching modules and Doherty power amplifiers. Background technique [0002] In order to meet the increasing demands of high data transmission rate and spectrum efficiency in the field of wireless communication, wider frequency bands, more complex modulation methods, and more channels are introduced. Complex modulation methods require the power amplifier to amplify the peak-to-average ratio signal. In order to meet the linearity requirements of the peak-to-average ratio signal, the power amplifier needs to work in the back-off state most of the time, which will bring about a significant decrease in back-off efficiency. The number of channels The increase of back-off efficiency also needs to be improved to reduce power consumption and heat dissipation. Currently, technologies that can improve back-off efficiency include envelope tracking...

AI Technical Summary

Problems solved by technology

In order to reduce the size, the current Doherty power amplifier generally outputs the 1 / 4 wavelength impedance transformation line in the output matching network (ie figure 1 The middle 1 / 4λ line) is equivalent to a lumped C-L-Cπ network, such as figure 1 As shown, the 1 / 4 wavelength impedance transformation line is equivalent to including the inductance L T and two capacitors C T The network composed of lumped C-L-Cπ type network includes: inductor L T , inductance L 1 , inductance L 2 , The parasitic drain-source capacitance Cds1 of the main circuit chip and the parasitic drain-source capacitance Cds2 of the auxiliary circuit chip, since the parameter values ​​of all circuit components in the lumped C-L-Cπ network are unique, when the circuit components are integrated into the chip , if the available space of the chip is limited, it may not be realized, that is to say, directly applying the lumped C-L-Cπ network to realize the chip will not be able to miniaturize

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