Simulation of internal electromagnetic interference for vehicular antenna performance evaluation

Due to the increasing number of infotainment and safety functions in vehicles, the need for reliable communication link is becoming very critical. A key consideration in providing a reliable link is the antenna performance, which is conventionally evaluated by its efficiency and ability to provide the required coverage upon integration in vehicles. However, modern vehicles are equipped with many electronic devices that emit electromagnetic interference (EMI), which can become the main bottleneck of vehicular antenna performance. In this work, a simulation framework is provided to study the impact of EMI on vehicular antenna performance. Specifically, full-wave car simulations of the coupling of EMI into antennas at the GSM900 band is presented as a case study to demonstrate the important need to address EMI issues in vehicular antenna design and implementation.