Signal couplers are used to unevenly split signal. Uneven splitting of signal can be used to "daisy-chain" antennas instead of home-running each antenna back to the amplifier.
The "coupling" figure of a device is the ratio of the coupled output to the input.
RSRF signal couplers are a low cost, high power, broadband solution for Distributed Antenna Systems (DAS) and cell phone signal boosters.
RSRF couplers cover from 600 MHz to 6000 MHz, and are 5G ready.