The ECA3562P25D50BP from ECHO Microwave is a Band Pass Filter with Frequency 3.55 to 3.58 GHz, Insertion Loss 2 dB, Rejection 50 dB @ 3500 to 3525MHz, Ripple 1 dB, Return Loss 18 dB. Tags: Cavity Filter. More details for ECA3562P25D50BP can be seen below.