A Low-Cost Bench for Training Students in Power Amplifier and Digital Predistortion

This paper presents a low-cost bench to provide a comprehensive set of measurement capabilities to train students in RF Integrated Circuits characterization and their enhancement with a focus on Power Amplifier (PA) and its associated Digital Predistortion (DPD). It brings into play two Universal Software Radio Peripherals (USRP) and a user-friendly interface to perform measurements on a radio-frequency (RF) chain and to extract circuit characteristics. The interface was designed on MATLAB App Designer to provide students with an ergonomic and pedagogical user experience. Additionally, DPD software was designed for students to evaluate various PA linearization models and benchmark their performances. Furthermore, students can use this bench to test and validate their own circuit designs, providing hands-on experience and helping them to gain a better understanding of the principles of RF design. Finally, a survey displays feedback on students’ pedagogical appreciation of the bench.