Analysis of the Soft-Switching Tuning Effect on the Figures of Merit Involved in the Design of a Class-E Amplifier with Finite DC-Feed Inductance

This paper explores the design of a Class-E amplifier with finite DC-feed inductance using three tuning methods. Furthermore, this work quantifies impacts process (referred to in as effect) on main figures merit (FoMs) amplifier. The goals were guarantee two conditions: zero voltage and derivative switching (i.e., soft-switching tuning). To best authors’ knowledge, systematic methods have not been analyzed before for topology. Two them are based iterative component process, they explored previously conventional class-E an RF choke inductance. last method simultaneous adjustment control signal period one capacitor. validated by extensive simulations case studies, which designed following power specifications Qi standard. In 100% 96% (ZVS) zero-derivative (ZDS) achieved, respectively. we identified unexpected behavior turning point), consisted change expected trend ZVS ZDS) point, it occurred 21% studies. When converged at least ZVS, required more iterations large number variables. Additionally, after total harmonic distortion output capacity improved 78% 61% respectively), whereas power, drain added efficiencies deteriorated 83%, 65% respectively) overall However, could identify improvement FoMs related tuning. impact was significant produced some improvements deleterious effects each study, without clear or method. Therefore, designer may choose favorable FoM trade-offs specifications.