The chief advantage of antenna combiners is that it allows two different devices to share a common communications channel. Typically the shared channel is a long piece of coaxial cable. Rather than run two separate cables, a single cable with diplexers at each end is used. The plan is economical if the diplexers cost less than running the second cable.

Diplexers might be used to connect two receivers inside a building to two antennas that are some distance away using a single cable. Alternatively, two transmitters might connect to two antennas.

A diplexer may be used as a form of duplexer, which is a device to enable bi-directional (duplex) communication over a single path. In this usage the high and low frequency signals are travelling in opposite directions at the shared port of the diplexer.

This antenna combiners or we can call it as  splitter combiner allows 2-way combining or splitting of TV antenna or cable signals. Each splitter is DC passive, which allows passage of low-voltage signals along the coax. Each splitter is housed in a high-quality casting and finish. Inside each splitter/combiner, a quality PCB is mounted that contains the internal components. This Channel Vision 2-Way Splitter/Combiner features low insertion loss.