The LF9422 from MtronPTI is a Diplexer with a lower frequency from 1710 to 1850 MHz and upper frequency from 2200 to 2500 MHz. It has an insertion loss of 1.25 dB and return loss of over 15 dB. The filter has 15 dB port to port isolation and can handle up to 5 watts of power. It is available in surface mount package and measures 1 x 1 x .2 inches.
