Doppler shift analysis of moving antennas above the road surface by using FDTD method

In this study, a method to analyze the Doppler shift of veh1cles running in line by FDTD method is proposed. The electromagnetic wave is radiated from antennas mounted on a moving vehicle, then, strong reflected wave from road surface is received by RX antenna. Therefore, Doppler shift is observed. In this paper, Doppler shift at 30 km/h in speed were analyzed. The frequency analyzed in this paper is 79 GHz. In the propagation characteristics, the Doppler shift characteristics of the radio waves reflected from the road surface and the vehicle are clearly shown.