In this paper, a design of a stacked multilayer aperture coupled millimeter-wave circular array antenna is proposed for 5G Femto base stations. As these base stations include miniature antennas where compact microstrip antennas with good impedance matching, high gain, and efficiency along with the reduction in sidelobe level which is the major advantage with aperture coupled feed mechanism. This array antenna exhibits low return loss at multiple frequency bands like 28GHz and 38GHz with reflection coefficient values like -18.74dB and -10.6dB including almost 100% radiation efficiency and attained maximum gain values like 11.93dBi and 10.44dBi. The proposed antenna achieves a sidelobe level value of 14dB at 28GHz in E-plane with wide beam widths of 80 0 and 85 0 at 28GHz and 38GHz respectively. There is a good agreement between simulated and measured results for the proposed aperture coupled millimeter-wave circular array antenna

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