A single layer dual linearly polarized microstrip patch antenna array for automotive applications in the 77 GHz band student submission

A dual linearly polarized antenna array for automotive applications in the 77 GHz band is presented. The array is composed of 10 single microstrip patch radiators excited by a sophisticated series circuit feed network. The realized amplitude taper and the carefully adjusted excitation phases lead to a low sidelobe level (SLL) and boresight radiation in broadside direction. The ports of the antenna array are precisely matched to 50 Ω over the complete frequency band from 76 to 79 GHz. With an extremely low cross-talk of below - 35 dB, purely linearly polarized waves are radiated in both channels. The radiation behavior is measured and shows a strong main beam in broadside direction, low sidelobes, and low cross polarized components.