Radio-frequency power amplifier system for microwave wireless power transmission device

Abstract

The invention provides a radio-frequency power amplifier system for a microwave wireless power transmission device. The radio-frequency power amplifier system comprises a first-stage power amplification circuit, a second-stage power amplification circuit and a third-stage power amplification circuit, which are sequentially connected in series; the first-stage power amplification circuit mainly comprises a signal-source-level power amplifier of an indium gallium phosphide heterojunction two-stage transistor; the second-stage power amplification circuit mainly comprises a driving-stage amplifierof a gallium arsenide heterojunction two-stage transistor; and a third-stage power amplifier mainly comprises a gallium nitride high-electron-mobility transistor. The radio-frequency power amplifiersystem provided by the invention is simple in topological structure, low in component cost, good in heat dissipation performance and low in temperature rising; high-power output can be carried out stably; and thus, power, efficiency and stability requirements of the microwave wireless power transmission device can be satisfied.

Description

technical field [0001] The invention relates to the field of microwave wireless power transmission, in particular to a radio frequency power amplifier system used in a microwave wireless power transmission device. Background technique [0002] In recent years, with the continuous improvement of people's living standards and the gradual deepening of exploration of the material world, people have new requirements for the transmission method and quality of electric energy. Traditional power transmission is mainly carried out by direct contact of wires or conductors. Sparks generated by contact, sliding wear, carbon accumulation and exposed charged conductors have brought a series of problems. Wireless power transmission is a technology that uses radio to transmit electric energy. It was first proposed by Nikola Tesla. Compared with traditional power transmission methods, there is no direct connection between power supply and power consumption in the process of wireless power tr...

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Problems solved by technology

[0003] Although it has been known that energy resonance is microwave to carry out wireless energy transmission, but in application, it is necessary to install a radio frequency power amplification system. The existing radio frequency power amplification system is relatively expensive, and the power supply of the existing radio frequency power amplifier system is low. Efficiency is usually lower than 50%, which is unacceptable for microwave wireless power transmission devices, because the efficiency and cost of power supply cannot meet the energy-saving standards

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