The ECA2103P14B40AQ from ECHO Microwave is a Band Pass Filter with Frequency 2.1 to 2.11 GHz, Insertion Loss 1 dB, Rejection 40 dB @ Fc to 12MHz, Ripple 0.8 dB, Return Loss 20 dB. Tags: Cavity Filter. More details for ECA2103P14B40AQ can be seen below.