A wideband high gain double EBG reflector antenna

A dipole antenna with a double electromagnetic band gap (EBG) reflector is presented for wide operating bandwidth and high gain. The antenna is excited by a printed dipole centrally positioned above the planar double-layered EBG structures which is partially loaded with a ground plane. The simulated and measured results show that a wide impedance bandwidth of 44.4% (SWR<2) over the frequency range from 2.8GHz to 4.4GHz is achieved. Stable radiation patterns with low cross-polarization levels and an achieved gain of ∼8.5 dBi over the ground plane of 1.167λ, X1.167 λ, is found across the entire operating bandwidth.

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