A Low-Profile Wideband and Dual-Polarized Antenna With AMC Reflector

In this paper, a wideband dual-polarized antenna with low-profile is designed. By loading the annular branches, a new resonant point is generated at high frequency to expand the antenna bandwidth. The high impedance surface of artificial magnetic conductor (AMC) is used as a metal reflection plate to reduce the antenna profile height. The simulation results show that the return loss of the two ports is lower than -15 dB from 1.73 GHz to 2.84 GHz, and the coupling of the two ports is lower than -25dB. The cross-polarization ratio of the antenna is about 27dB. The profile height of the antenna is 0.176 λ
0
at 2.2GHz (λ
0
is the wavelength at free space).In the range of 1.73-2.84GHz, the proposed antenna has a stable pattern in the ± 45° polarization direction, stable gain above 8dBi and peak gain up to 9.5dBi.