The ECA1670P30B70A from ECHO Microwave is a Band Pass Filter with Frequency 1.66 to 1.69 GHz, Insertion Loss 1.5 dB, Rejection 70 dB @ 1585&1755MHz, Ripple 0.3 dB, Return Loss 18 dB. Tags: Cavity Filter. More details for ECA1670P30B70A can be seen below.