The EMA8J1091P84H28D from ECHO Microwave is a Band Pass Filter with Frequency 1.04 to 1.14 GHz, Insertion Loss 4 dB, Rejection 28 to 45 dB, Return Loss 13 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8J1091P84H28D can be seen below.