The ECA4400P1400D30A from ECHO Microwave is a Band Pass Filter with Frequency 3.6 to 5 GHz, Insertion Loss 1.5 dB, Rejection 30 dB @ 3000&5200MHz, Ripple 1 dB, Return Loss 12 dB. Tags: Cavity Filter. More details for ECA4400P1400D30A can be seen below.