The AE1900-2237DB5386 from Anatech Electronics is a RF Duplexer with Frequency 1.78 to 2.07 GHz / 2.23 to 2.24 GHz, Band 1 1.78 to 2.07 GHz, Band 2 2.23 to 2.24 GHz, Power 25 W, Insertion Loss 1.5 dB. Tags: Module with Connectors. More details for AE1900-2237DB5386 can be seen below.