The ECA1370P40B52A from ECHO Microwave is a Band Pass Filter with Frequency 1.35 to 1.39 GHz, Insertion Loss 1 dB, Rejection 52 dB @ 1 to 872MHz, Ripple 0.6 dB, Return Loss 14 dB. Tags: Cavity Filter. More details for ECA1370P40B52A can be seen below.