COMBINING POWER FROM ELECTRICALLY ISOLATED POWER PATHS FOR POWERING REMOTE UNITS IN A DISTRIBUTED ANTENNA SYSTEM(S) (DASS)

摘要

Embodiments disclosed herein include combining power from isolated power paths for powering remote units in distributed antenna systems (DASs). In one example, a remote unit(s) is configured to include multiple input power ports for receiving power from multiple power paths. The received power from each input power port is combined to provide a combined output power for powering the remote unit. Thus, a remote unit can be powered by the combined output power. To avoid differences in received power on the multiple input power ports causing a power supply to supply higher power than designed or regulated, the input power ports in the remote unit are electrically isolated from each other. Further, the received power on the multiple power inputs ports can be controlled to be proportionally provided to the combined output power according to the maximum power supplying capabilities of the respective power supplies.

主权项

1. A remote unit for a distributed antenna system (DAS), comprising:
a plurality of internal power paths each configured to carry power to a combined power node coupled to at least one remote unit load to provide a combined output power to the at least one remote unit load; a plurality of input power ports provided in a respective internal power path among the plurality of internal power paths, each input power port among the plurality of input power ports configured to receive input power from a respective external power path in a DAS; a plurality of isolation circuits provided in a respective internal power path among the plurality of internal power paths, each isolation circuit among the plurality of isolation circuits configured to: receive the input power from the respective input power port; and provide an electrically isolated output power based on the received input power at the combined power node to provide the combined output power; a plurality of control circuits provided between the combined power node and the plurality of isolation circuits in a respective internal power path among the plurality of internal power paths to control the electrically isolated output power provided to the combined power node; and a controller configured to selectively control the plurality of control circuits to control the electrically isolated output power delivered from each isolation circuit in the respective internal power path, to the combined power node into the combined output power.