Study on propagation loss characteristics considering car antenna position for inter-vehicle communications using 700MHz band at intersection

In the development of the inter-vehicle communication systems for the prevention of car crashes, it is important to know radio propagation characteristics at blind intersections. In field experiments and numerical simulations to investigate radio propagations, a half wavelength dipole antenna is assumed to be the wave source in many cases. However, the directivity of car antenna is changed by effects of car body and antenna positions on car body. Therefore, it is necessary to investigate effects of car antenna positions on radio propagation characteristics at blind intersections. In this paper, propagation loss characteristics considering car antenna position for inter-vehicle communications using 700 MHz band at a blind intersection is investigated. Here, the hybrid method using both the FDTD and ray-tracing methods is used for the electromagnetic analysis.