The ECA2337P21I70AP-DR from ECHO Microwave is a Band Pass Filter with Frequency 2.33 to 2.35 GHz, Insertion Loss 4.5 dB, Rejection 70 dB @ 2300 to 2325MHz, Ripple 3.5 dB, Return Loss 18 dB. Tags: Cavity Filter. More details for ECA2337P21I70AP-DR can be seen below.