The SiMF11R5/1-6E2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 10.9 to 12 GHz, Center Frequency 11.5 GHz, Insertion Loss 2 dB, Rejection 30 dB @10GHz&12.8GHz, 40 dB @9.6GHz&13.15GHz, 60 dB @DC~7GHz, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Cavity Filter. More details for SiMF11R5/1-6E2 can be seen below.