At present, the global 5G layout is accelerating. Traditional 3G/4G base station
distributed architecture can be divided into BBU, RRU and antenna feeder system, in
which RRU and antenna feeder system are connected by feeder. As the risk of transmission
loss increases with high frequency, the architecture of integrated RRU and antenna
feeder system can reduce the signal loss on the feeder and improve the transmission
efficiency. The high integration makes a large number of scattered components replaced
by PCB boards, which ultimately increases the unit usage of PCB.
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