A compact dual-band dual-linearly polarized waveguide slot array antenna with groove at waveguide bottom

Abstract A dual-band dual-linearly polarized waveguide slot array antenna is proposed in this paper. Two orthogonal slots share a short-circuit wall on broad side. The horizontal and vertical slots, which actualize dual-frequency bands dual-linear polarization, generate vertically electric fields 9.39–9.78 GHz horizontally 11.62–12.3 GHz, respectively. equivalent permittivity of the changed by two grooves at bottom waveguide, improves phase velocity. can also reduce distance between elements while suppressing side lobes. Compared to filling medium have less losses. Moreover, simple with one input port. overcomes problems beam scanning compared traditional antenna. 1 × 8 fabricated measured verify design. polarization formed generated gain reach 15 dBi.