The SiMF15R5/3-8D2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 14 to 17 GHz, Center Frequency 15.5 GHz, Insertion Loss 1.8 dB, Rejection 30 dB @13GHz&18.1GHz, 40 dB @12.6GHz&18.4GHz, 60 dB @DC~11GHz, 50 dB @19~21.5GHz, Upper Rejection 30 to 50 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF15R5/3-8D2 can be seen below.