The MFBC-00018CH from Marki Microwave is a Band Pass Filter with Frequency 44.50 to 62.50 GHz, Center Frequency 53750 MHz, Insertion Loss 1.94 to 2 dB, Lower Rejection 30 to 52 dB, Return Loss 10 to 23.85 dB. Tags: Die, MMIC Filter. More details for MFBC-00018CH can be seen below.