Design of a multi-octave power amplifier with a novel broadband design methodology

Abstract

This paper presents a multi-octave power amplifier based on a modified simplified real frequency method. The approximate range of the optimal impedance of the transistor in the wide band on the Smith chart is obtained by the load-pull technique, and the coincidence degree of the optimal impedance value and the input impedance value of the matching circuit is taken as a new optimization objective and added into the algorithm. Then the improved algorithm is used to design the amplifier's wideband matching circuit. In order to verify validity, a 0.5-2.8 GHz power amplifier is designed and fabricated. And the measured results show that the saturated output power is between 40.0 dBm and 42.8 dBm in target band. From 63% to 69% drain efficiency is obtained with a gain from 10 dB to 12 dB.

Design of broadband power amplifier based on loop-shaped filter matching structure

“…Continuous mode PA is one of the effective ways to expand its working bandwidth while ensuring high efficiency [11,12,13]. It expands the impedance space of its fundamental wave and harmonics by introducing parameters, but in the actual design, it can be realized with the aid of real-frequency algorithms [14,15].…”

A GaN Microwave Power Amplifier Design Based on the Source/Load Pull Impedance Modeling via Virtual Gain Optimization

“…For wireless communication systems, it is essential to design power amplifiers (PA) for a variety of applications [1][2][3][4][5][6][7][8][9]. Nowadays, it is a common practice to employ Gallium Nitrate (GaN) transistors due to their high-power delivery capacity [10][11][12][13].…”