The SiMF11R8/3R5-2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 10.05 to 13.55 GHz, Center Frequency 11.8 GHz, Insertion Loss 2 dB, Rejection 30 dB @9GHz&14.6GHz, 40 dB @8.5GHz&15GHz, 60 dB @DC~7GHz, 55 dB @16~19GHz, Upper Rejection 30 to 55 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF11R8/3R5-2 can be seen below.