Compact and low-profile conical antenna for automotive DSRC application

This study proposes a novel conical monopole antenna with a metallic lid connected to the antenna ground through four pillars. The proposed conical monopole antenna is only 0.14-λ₀ in height, which is low profile, compact in size, and suitable for automotive antenna application. By using the metallic lid placed above the conical shell monopole antenna, the measured peak gain 6.6 dBi, efficiency 84 %, and omnidirectional radiation on the horizontal plane at 5.875 GHz are achieved. The antenna is embedded into a shark-fin radome and mounted on the rooftop of a vehicle to experimentally validate the application of vehicular communication system.