The ECA1733P2G90A-DR from ECHO Microwave is a Band Pass Filter with Frequency 1.73 to 1.73 GHz, Insertion Loss 3.5 dB, Rejection 90 dB @ 1650 to 1712.2MHz, Ripple 3.5 dB, Return Loss 20 dB. Tags: Cavity Filter. More details for ECA1733P2G90A-DR can be seen below.