Impact of RF cables on the electromagnetic environment in vehicles

Abstract

As the demand for connectivity and infotainment services increases in the automotive world, the need to measure and characterize the propagation channels inside vehicles also increases. In this work, a measurement study was performed to investigate the influence of RF cables on in-vehicle channels. It was found that, for the same transmit and receive antenna positions, the routing of the measurement cables can significantly affect the channel impulse response. This result points to the need for alternative strategies or solutions to obtain accurate and repeatable in-vehicle channel measurements.

Model Simplification and Validation of Virtual Prototypes for Vehicular Antenna Design

“…Furthermore, it should be noted that for Model C, the seat frames and the dashboard were removed, which result in a very different electromagnetic environment inside the car. It has been shown in [11] that even minor variations of the metallic parts can result in different distribution of electric fields and currents inside the car. However, further work is necessary to determine an appropriate cutoff point for pattern similarity for the purpose of vehicular antenna simulation.…”

“…Based on a more realistic car model, accounting for the curvatures of a modern car body (of Volvo XC60) but retaining only the main part of the metallic frame, a simulation framework for studying the impact of electromagnetic interference on vehicular antenna performance is proposed in [10]. In addition, a similar car model as [10] (but with the inclusion of glass windows) was used to investigate the influence of RF cables on in-vehicle channel measurements [11]. But as in earlier studies [5]- [9], [10] and [11] do not explore the relationship between the simplification of car body and the accuracy of simulated antenna performance.…”

“…In addition, a similar car model as [10] (but with the inclusion of glass windows) was used to investigate the influence of RF cables on in-vehicle channel measurements [11]. But as in earlier studies [5]- [9], [10] and [11] do not explore the relationship between the simplification of car body and the accuracy of simulated antenna performance.…”