  A planar magneto-electric (ME) dipole antenna array is proposed and
demonstrated by both full-wave analysis and experiments. The proposed structure
leverages the infinite wavelength propagation characteristic of composite
right/left-handed (CRLH) transmission lines to form high-gain magnetic
radiators combined with radial conventional electric radiators, where the
overall structure is excited by a single differential feed. The traveling-wave
type nature of the proposed ME-dipole antenna enables the formation of
directive arrays with high-gain characteristics and scanning capability. Peak
gains of 10.84 dB and 5.73 dB are demonstrated for the electric dipole and
magnetic-dipole radiation components, respectively.
