The AM782-751D319 from Anatech is a Ceramic Duplexer with Band 1 from 746 to 756 MHz and Band 2 from 777 to 787 MHz. The Duplexer has an insertion loss of less than 2.8 dB and an isolation of over 50 dB. It can handle up to 2 watts of power and is available in a surface mount package that measures 34 x 18 x 5 mm.