The MFBP-00051CH from Marki Microwave is a Band Pass Filter with Frequency 36.79 to 40 GHz, Center Frequency 38360 MHz, Insertion Loss 2.49 dB, Return Loss 22.34 dB, Operating_Temperature -55 to 100 Degree C. Tags: Die, MMIC Filter. More details for MFBP-00051CH can be seen below.