A novel low-profile wideband dual-polarized metasurface antenna with high isolation

In this work, a novel low-profile wideband dualpolarized metasurface (MS) antenna with high isolation is proposed for C-band applications. To achieve dual polarizations, the MS is not only used as a radiator but also as a ground plane. In detail, for vertical polarization (VP), the MS is a radiator fed by a slot-coupled microstrip line, and for horizontal polarization (HP), the MS is a ground plane of a differential-coaxial patch radiator. The overall size of the proposed antenna is 1.1λ
0
×1.1λ
0
×0.079λ
0
(λ
0
is the free-space wavelength at 5.5 GHz). The simulated results show that the -10dB impedance bandwidths of the HP and VP are 28.4% (4.84~6.44GHz) and 38.7% (4.83~7.15GHz), respectively. Besides, the isolation between the two ports is higher than 51dB, and the maximum realized gain is 9.6dBi and 9.1dBi.