This paper introduces a reconfigurable antenna array operating in the L band. Firstly, a reconfigurable antenna unit is designed based on the bistable glass fiber material. By switching the two configurations of the antenna unit, the 90° pattern reconfiguration and polarization reconfiguration can be realized. Simulation results show that the -8 dB impedance matching bandwidth of the configuration I is from 0.95 GHz to 1.9 GHz with right-handed circular polarization (RHCP), and the bandwidth of the configuration II is from 0.9 GHz to 2.0 GHz with left-handed circular polarization (LHCP). Based on the antenna unit, an antenna array containing 2×2 units is designed. By controlling the switch of the units, radiation in ±x axis directions can be realized, and three polarization modes can be realized in both directions, including RHCP, LHCP and linear polarization (LP). The proposed antenna has the characteristic of multi-functional integration, and it is a novel reconfigurable antenna.