A novel approach is proposed for automated dimension estimation in memory polynomial based power amplifiers/transmitters behavioral models. This method consists of successively identifying the static nonlinearity order and memory depth of the model in accordance with a predefined performance criterion. The proposed method is validated using a 3G Doherty power amplifier driven by various WCDMA s...

This paper presents a Ka-band three-stage power amplifier for 5G communications, which has been implemented in 150 nm GaN-on-SiC technology and adopts Doherty architecture. The is made up of 50 Ω input buffer, drives splitter, thanks to it delivers its output the two units topology, namely main auxiliary amplifier. Finally, outputs amplifiers are properly arranged current combining scheme that ...

Doherty type Power Amplifier (DPA) design is one of the most practical efficiency enhancement methods that provide moderate linearity. Asymmetrical device usage and employment of bias adaptation are among the most commonly used Doherty architectures in recent applications. In this paper, the efficiency performances of bias adapted DPA and asymmetrical DPA are compared based on the efficiency ex...

This paper discusses the design of a wideband class AB-C Doherty power amplifier suitable for 5G applications. Theoretical analysis output matching network is presented, focusing on impact non-ideally infinite impedance auxiliary in back off, due to device’s parasitic elements. By properly accounting this effect, designed was able follow desired trajectories across 2.8 GHz 3.6 range (fractional...