The ECA7840P20BL30A from ECHO Microwave is a Band Pass Filter with Frequency 7.83 to 7.85 GHz, Insertion Loss 1 dB, Rejection 30 dB @ 5000 to 7770Mhz, Ripple 0.6 dB, Return Loss 18 dB. Tags: Cavity Filter. More details for ECA7840P20BL30A can be seen below.