The ECA5745P40D20NFM from ECHO Microwave is a Band Pass Filter with Frequency 5.73 to 5.77 GHz, Insertion Loss 1.6 dB, Rejection 20 dB @ DC to 5705MHz, Ripple 0.7 dB, Return Loss 16 dB. Tags: Cavity Filter. More details for ECA5745P40D20NFM can be seen below.