The AD1747-1842D335 from Anatech Electronics is a cavity duplexer with pass bands from 1710 MHz to 1785 MHz and 1805 MHz to 1880 MHz. It has an insertion loss of less than 1.2 dB, an isolation of more than 50 dB and return loss of more than 14 dB. The duplexer can handle over 50 W of power. It measures 97 x 74 x 40 mm and is available with SMA female connectors.