Composite cavity-backed crossed dipole coupled to a magneto-electric dipole

In this paper, we present a composite cavity-backed crossed dipole coupled to a magneto-electric (ME) dipole. The crossed dipole was fed by double-printed vacant-quarter rings to produce one minimum axial ratio (AR) point in the AR profile, and the presence of the ME dipole produced another minimum AR point. By combining these two minimum AR points, the antenna achieved a broadband AR bandwidth. In addition, the crossed dipole coupled to an ME dipole was incorporated with a cavity-backed reflector to provide a unidirectional radiation pattern with a wide AR beamwidth and a high front-to-back ratio.