The EMA8J2220P20F40D from ECHO Microwave is a Band Pass Filter with Frequency 2.21 to 2.23 GHz, Insertion Loss 2.5 dB, Rejection 40 dB @ 2160 MHz, Return Loss 15 dB. Tags: Surface Mount, Ceramic, Ceramic Filter. More details for EMA8J2220P20F40D can be seen below.