A High Noise Immunity Monopulse Direction of Arrival Estimation Antenna for Vehicle Tracking

In this study, a new DOA (Direction-of-Arrival) estimation antenna for vehicle tracking is proposed to realize direct V2V (Vehicle-to-Vehicle) communications in platooning. The proposed DOA estimation antenna is based on the monopulse mechanism, and it consists of two microstrip antennas and a magic-T. To achieve high noise immunity, the sum radiation pattern has to be wider because the amplitude of the sum signal becomes low at large angles. The proposed DOA estimation antenna uses a high-permittivity substrate to increase the beam width of the sum signal. The high-permittivity substrate is also effective to miniaturize the antenna.