THMA2: Dynamic Gain Model Pre-Distortion Methodology applied towards Digital Beam Former Design

Abstract
A methodology is introduced to explore linearization potential of candidate circuit designs for digital beamforming applications. By observing input and output waveform content a dynamic gain model (DGM) can be extracted from simulation or measurement. The resulting DGM can be applied as a digital twin and inserted early in the design cycle, allowing both circuit and system designers to better predict signal impairment with confidence and apply pre-distortion techniques to enhance output power and efficiency. A realistic test case is presented using a candidate X-Band power amplifier and extracted model applied in phased array design.