Single-layer broadband vertically polarized endfire magnetoelectric dipole loop antenna and array

A single-layer broadband vertically polarized endfire magnetoelectric dipole antenna, for millimeter-wave applications, wherein, the antenna comprises a substrate-integrated closed loop (2) as a main radiator of the antenna, a substrate integrated waveguide (4) for feeding, two parallel-strip lines (3) for connecting the substrate-integrated closed loop (2) and the substrate integrated waveguide, the substrate-integrated closed loop (2), the substrate integrated waveguide (4) and the parallel-strip lines (3) are arranged in one single layer dielectric substrate (1);

• the substrate-integrated closed loop (2) is a magnetoelectric dipole structure composed of two horizontal metallic strips (21) and a pair of first vertical metallic vias (22), the pair of first vertical metallic vias (22) extend vertically along the thickness direction of the substrate (1), the two horizontal metallic strips (21) are symmetrically disposed on upper and lower surfaces of the substrate (1), each of the first vertical metallic vias (22) is connected between an upper and lower directly opposite ends of the two horizontal metallic strips (21), each of the horizontal metallic strips (21) is connected to the substrate integrated waveguide (4) through one of the parallel-strip lines (3);
• excited by the two parallel-strip lines (3), the first vertical metallic vias (22) function as electric dipoles while a radiation aperture of the entire substrate-integrated closed loop (2) is equivalent to a magnetic dipole, generating endfire radiation.