Statistical Approach to Link Budget Analysis and Optimization of UWB Antennas

The increasing adoption of the UWB technology in the automotive industry has led to a growing need for a compact keyfob antenna that delivers optimal performance in the UWB frequency range. Despite existing research, the optimal antenna placement for the maximum coverage and robustness in the restricted board area remains unexplored. This study aims to address this knowledge gap by proposing and comparing three different antenna configurations with varying polarization and shapes. For that, a statistical approach will be employed to determine the most robust antenna design for RKE systems, considering an angle coverage and a link budget between a keyfob antenna and a car anchor. The antenna designs will be simulated using Ansys HFSS, incorporating human models to mimic real-world scenarios, and validated through measurements in an anechoic chamber. The results of this research will provide a systematic approach for selecting the antenna design for a keyfob, enabling the development of more reliable and efficient RKE systems.