A low-profile and wideband patch antenna is proposed for base station applications. In order to realize a wide band, two types of slots are adopted and three resonant modes are constructed within a band of interest. Mode analysis are conducted to clarify the wideband performance. The designed antenna has an impedance bandwidth of 52.7% (from 1.62 GHz to 2.78 GHz) with a low-profile structure of 0.7$\lambda_{0}\times$ 0.47$\lambda_{0}\times$ 0.084$\lambda_{0}$, where $\lambda_{0}$ is the free space wavelength at the center frequency. The measurement results of a prototype agree well with the simulations. The measured average gain is 6 dBi and the radiation patterns remain stable in the required bands with low cross-polarization, low back lobes, nearly identical E- and H-plane patterns. The proposed multi-resonant antenna can cover six bands of wireless communication, such as DCS, PCS, UMTS, WLAN, LTE2300 and LTE2600, exhibiting great potentials in applications of multi-band wireless communication systems.