The MFBP-00057CH from Marki Microwave is a Band Pass Filter with Frequency 30.49 to 46.23 GHz, Center Frequency 37540 MHz, Insertion Loss 1.5 dB, Return Loss 22.67 dB, Operating_Temperature -55 to 100 Degree C. Tags: Die, MMIC Filter. More details for MFBP-00057CH can be seen below.