J type power amplification circuit based on parasitic compensation and radio frequency power amplifier

Abstract

The invention is suitable for the field of radio frequency communication and provides a J type power amplification circuit based on parasitic compensation and a radio frequency power amplifier. The circuit comprises a transistor, a parasitic circuit, a harmonic parasitic compensation unit, a harmonic impedance control unit and a fundamental wave impedance control unit, wherein the input end of the harmonic parasitic compensation unit is connected with the power signal output end of the transistor; the input end of the harmonic impedance control unit is connected with the output end of the harmonic parasitic compensation unit; the input end of the fundamental wave impedance control unit is connected with the output end of the harmonic impedance control unit, and the output end of the fundamental wave impedance control unit is connected with a load through a capacitor. According to the J type power amplification circuit based on parasitic compensation, a harmonic parasitic compensation network is utilized to compensate on harmonic impedance of the transistor of the power amplifier, so that the accurate control of fundamental wave impedance, second harmonic impedance and third harmonic impedance is achieved, the energy loss of the transistor is reduced, the efficiency and linearity of the power amplifier are improved; through independent design of the second harmonic impedance and the third harmonic impedance, each harmonic impedance control circuit does not affect each other, the optimized debugging at a later period is not needed, and the design complexity is reduced.

Description

technical field [0001] The invention belongs to the field of radio frequency communication, and in particular relates to a class J power amplifier circuit and a radio frequency power amplifier based on parasitic compensation. Background technique [0002] Today, the promotion of "green communication" and the increasing scarcity of radio spectrum resources have brought huge challenges to traditional wireless communication systems, resulting in increasingly stringent requirements for efficiency and linearity in communication systems. With the improvement of communication system index requirements, the design index of sub-modules in the communication system is also getting higher and higher, and the radio frequency power amplifier of the final stage of the transmitter in the wireless communication system is the key module that affects the efficiency and linearity of the entire communication system. At the same time, due to the rapid development of the wireless communication ind...

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a class J power amplifier circuit based on parasitic compensation, which aims to solve the problem that the parasitic parameters generated by the transistor package in the existing class J power amplifier circuit affect the impedance matching of the amplifier, thus affecting the efficiency and linearity index The problem

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