Sometimes referred to as combiners or splitters, these duplexers are basically band-pass filters, simultaneously passing RF in both directions through the common connector, while the band-pass filters provide a high degree of isolation between ports.
- TX and RX from two radios at the same time into a dual-band antenna.
- Combine a dual-band radio with separate outputs into a dual-band antenna.
- Separate a single connector duplexed radio into separate antenna systems
- Allow a single coax run into two antennas at the top of the tower, and two radios at the bottom by using a duplexer at both ends of the coax run, avoiding additional coaxial cost and weight.