The AF-11-DUP-L is a low-band duplexer for use with the AF-11. Each duplexer has a low channel (10.700 - 10.955 GHz) and high channel (11.200 - 11.445 GHz) that can be configured by simply reversing the position of the duplexer. A single duplexer operates in SISO mode, while adding a second duplexer allows the AF-11 to operate in MIMO mode.