Abstract: A massive MIMO antenna array for the 5G communication system is designed. The antenna array is with 8×8 elements and the rectangular arrangement. The patch fed by coupled slots is chosen as the array element, which realizes ±45° dual-linear polarization by the excitation of two orthogonal H shape aperture slots etched on the upper ground. The designed antenna covering 3.4 GHz~3. 6 GHz frequency band has advantages such as low profile,compact structure and easy integration with RF frontend, which can meet the demand of antenna array for the next generation communication system.