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Since the band frequency of 5G NR is higher than 4G, its signals are prone to suffer from interference or shielding, especially the high-frequency millimeter wave (mmWave), and the transmission distance will be far shorter than that of the 4G low-frequency band. Therefore, when planning to increase the coverage of 5G high-frequency signals, it is necessary to deploy more base stations, which is why AAU and small-cell base stations have attracted much attention. Because small base stations are normally installed in outdoor environments, it is recommended to choose MEAN WELL HEP series harsh environment power supply to enhance the reliability of the entire base station.
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