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Cardiff Model Utilization for Predicting the Response of Multiple-Input Power Amplifiers | IEEE Conference Publication | IEEE Xplore

Cardiff Model Utilization for Predicting the Response of Multiple-Input Power Amplifiers


Abstract:

This paper explores the use of the Cardiff non-linear behavioral model to characterize the response of multiple-input power amplifiers. In particular, a case study is pre...Show More

Abstract:

This paper explores the use of the Cardiff non-linear behavioral model to characterize the response of multiple-input power amplifiers. In particular, a case study is presented on a 300 W load modulated balanced amplifier operating at 2.1 GHz. The model mathematical formulation is presented, and the comparison between original data and model shows an error below 3%. More importantly, it is shown that the model can accurately interpolate between characterization points allowing a reduction of up to 96% of the points needed to accurately predict the model behavior. This significantly reduces the simulation and measurement time for multiple-input PA's whilst attempting to determine the optimal driving conditions.
Date of Conference: 09-13 May 2022
Date Added to IEEE Xplore: 18 July 2022
ISBN Information:

ISSN Information:

Conference Location: Pizzo Calabro, Italy

I. Introduction

Modern communication signals have a very large peak to average power ratio to increase their spectral efficiency. This requires the use of advanced power amplifier (PA) architectures to provide amplification with good energy efficiency. Most of these architectures make use of multiple transistors interacting non-linearly. The most popular of these solutions is the Doherty PA [1], which is almost a standard choice in narrowband base-station transmitters. The more recently introduced load modulated balanced amplifier (LMBA) [2], [3] and some of its variants, like the inverted-LMBA, have demonstrated a better ability to operate on wider frequency bands.

References

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