Antennas constitute a decisive component of all communications abilities. The development of ground, air, sea, and space-based antennas must totally comply with the state-of-the-art and beyond advances in vehicle communications systems. Mobility, bandwidth demands, gain and radiation efficiency as well as low cost and simple integration are requirements that need to be met concurrently. In cases where conformality is also a prerequisite, planar and slot antennas prove to be optimal solutions. In this context, a conical slot antenna for vehicle applications at VHF-UHF operation frequencies is presented. The simulation and the measurement results show that the proposed slot antenna provides efficient radiation pattern while being lightweight, low cost and simple to manufacture and integrate.