Improvement of Over-the-Air Antenna Performance Tests for Electric Vehicle Alternating Current Chargers

This paper aims to provide robust cellular connectivity for alternating current electric vehicle (AC EV) chargers by implementing reliable cellular communication protocols and optimizing antenna performance. Key performance metrics such as Total Radiated Power (TRP) and Total Isotropic Sensitivity (TIS) were used to scale and assess connectivity between the LTE module, antennas, and base station. A root-cause analysis identified factors causing poor antenna performance, and theoretical data supported solutions to streamline testing processes. The results offer a framework to enhance connectivity, ensuring remote control of AC EV chargers as mandated by the Open Charge Point Protocol (OCPP).