Couplers, also known as a taps, are used to place multiple broadcast antennas in a long line when installing a cell phone signal booster system. This component unevenly distributes the signal coming into and out of the coupler with low-loss signal throughput. This allows less signal loss out of one port ensuring that the next broadcast antenna down the line receives adequate signal. Couplers come in -6 dB and -10 dB options.