The AE1937-1972DB5145 from Anatech Electronics is a RF Duplexer with Frequency 1.93 to 1.945 GHz / 1.965 to 1.98 GHz, Band 1 1.93 to 1.945 GHz, Band 2 1.965 to 1.98 GHz, Insertion Loss 1 dB, Isolation 30 dB. Tags: Module with Connectors. More details for AE1937-1972DB5145 can be seen below.