Denis-Adrian Neagu

•Schematic design •Layout design for PCBs of varying complexities •Bill of Materials (BOM) calculation •Production, including pick and place operations and reworks •Prototype PCB testing •Bring-up measurements and documentation

•Measurements using oscilloscope for automotive grade video interfaces •VNA measurements (TDR / SI measurements) - 1/2/4 ports

For my dissertation, I developed a wireless charging system using the Qi standard rated at 5W, widely used for low-power devices like smartphones. The project focused on inductive power transfer, where energy is transmitted wirelessly between coils using electromagnetic induction. Key achievements: - Designed a resonant tank circuit to operate in the frequency range of the Qi standard. - Built the system using an H-bridge driver IC, signal filters, and a microcontroller. - Implemented Qi-compliant amplitude-modulated communication between transmitter and receiver. - Created the schematic and PCB layout in Altium - Simulations for the resonant tank and full-bridge - Measurements using oscilloscope The result was a functional wireless charger with a clean design and broad compatibility. I also analyzed limitations like heat, efficiency (~70%), and alignment sensitivity. This project strengthened my skills in electronics design, embedded systems, and PCB layout.

•Realising the documentation for the bachelor's thesis •Establishing the limits specified by the manufacturer •Simulations in the CST Studio Suite program for TDR and S Parameters using real-life IBIS models •Measurements with the help of the VNA for TDR and S parameters •Correlation of results