The EMA6F1843P78H28DL from ECHO Microwave is a Band Pass Filter with Frequency 1.8 to 1.88 GHz, Insertion Loss 4 dB, Rejection 28 to 55 dB, Return Loss 16 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA6F1843P78H28DL can be seen below.