Design method of broadband high-efficiency J-type power amplifier

Abstract

The invention discloses a design method of a broadband high-efficiency J-type power amplifier. The power amplifier comprises an input matching network, a power amplifier, an output matching network, agrid bias network and a drain power supply network. A new target function is provided, and fundamental wave impedance and second harmonic impedance can be controlled at the same time; a two-dimensional optimization method is provided; the width and the length of the transmission line are used as optimization variables, and the fundamental wave impedance and the second harmonic impedance synthesized in the working frequency band are close to each other and change along with the change of the target impedance value, so that the matching flexibility is improved, the matching effect is enhanced,and the broadband characteristic and the efficiency characteristic of the J-type power amplifier can be better enhanced. Under the application background of the high-efficiency broadband power amplifier, aiming at the requirements of a broadband high-efficiency design method, the broadband high-efficiency design method has the advantages of simple structure, streamlined design steps and wider applicability.

Description

technical field [0001] The invention relates to the field of radio frequency microwave communication, in particular to a design method of a broadband high-efficiency Class J power amplifier. Background technique [0002] With the rapid development of wireless communication technology, the connection between various electronic devices has become closer. In order to meet the increasing demand for high-speed broadband data services and to reduce the operating costs of communication base stations, multi-mode and multi-standard communication systems have been widely used. This makes the already limited spectrum resources more tense, and the bandwidth of the modulated signal becomes wider and wider, especially the upcoming 5G communication system will require greater bandwidth. put forward higher requirements. As an important part of the wireless communication system, the broadband characteristic of the power amplifier has also become an important index to measure the power ampl...

AI Technical Summary

Problems solved by technology

However, real frequency technology also has disadvantages. Only the width of the transmission line is an optimization variable. In distributed parameters, the synthesized matching network is generally a series structure, and all transmission lines are generally of equal length.

This reduces the flexibility of matching and the effect of matching

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