A Heat Dissipating Dual-Pol Antenna Array with AMC Fins for Sub-6GHz Massive MIMO Systems

This paper presents a dual-polarized antenna array (AA) with the artificial magnetic conductor (AMC) fins implemented on the heatsink on the antenna side to increase heat dissipation and reduce the size of the fifth-generation mobile network (5G) radio unit. The AMC fins on the heatsink, which are attached to the same side of antenna, are composed of periodically arranged λ/4-height (20 mm) aluminum rectangle fins for 3.7 GHz on the aluminum base. Vivaldi antenna elements are used to cover the broadband frequency range of 3.4-4.4 GHz within sub-6 GHz. Through thermal and far-field measurements, compared to the conventional heat dissipating AA, the cooling performance improvement of more than 50% at natural convection was verified due to the additional heat dissipation from the heatsink using AMC fins without degrading of the antenna performances.