Design method for guiding inter-stage matching circuit of radio frequency power amplifier by using modeling

Abstract

The invention discloses a design method for guiding an inter-stage matching circuit of a radio frequency power amplifier by using modeling. The design method comprises the following steps: first-stageoutput impedance data and second-stage input impedance data of each frequency point in a first-stage power amplifier broadband and a second-stage power amplifier broadband are acquired; after being processed, the first-stage output impedance data and the second-stage input impedance data are used as impedance values to perform modeling training and testing data, a BPNN model of the first-stage output impedance and a BPNN model of the second-stage input impedance are trained respectively, and a BPNN model is obtained; data of interstage impedance of the two stages of power amplifiers at all frequency points are obtained by the BPNN model, data in the BPNN model are directly called when interstage matching circuit design and optimization are carried out. According to the method, the computing power of the neural network is used, the neural network is used for modeling according to simulation data of the circuit, the model is used for predicting unsimulated data of the circuit, and therefore a large amount of simulation optimization time is saved.

Description

technical field [0001] The invention relates to the technical field of circuit design of radio frequency microwave power amplifiers, in particular to a method for designing inter-stage matching circuits of radio frequency power amplifiers guided by modeling. Background technique [0002] With the rapid development of modern wireless communication, RF power amplifier, as the most expensive nonlinear device with the largest power consumption in the system, has been widely studied in the RF field. As the most critical module of the RF front-end of a wireless transmitter, the RF power amplifier has always been the focus of the RF / microwave communication field. In the process of inter-stage matching design of traditional multi-stage power amplifiers, designers need to spend a lot of time on simulation modification and optimization. In order to improve product performance, shorten the design cycle, and reduce costs, designers often rely on efficient and accurate device models in ...

AI Technical Summary

Problems solved by technology

[0003] However, in the process of inter-stage matching design of traditional multi-stage power amplifiers, in order to achieve a good matching effect, designers need to optimize the matching circuit for a long time, especially in complex circuit design, it often takes a long time to simulate once, and the circuit design Many times of simulation optimization are required, and it often takes a long time to complete a design

That is, the time-consuming and labor-intensive defects of the traditional multi-stage power amplifier design method cannot adapt to the rapid development of the existing device modeling technology

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