The SiMS22R4/1R2-5P2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 21.8 to 23 GHz, Center Frequency 22.4 GHz, Insertion Loss 2.5 dB, Rejection 30 dB @20.7GHz&24.4GHz, 40 dB @20.2GHz&25GHz, 45 dB @DC~17GHz, 45 dB @25.2~31GHz, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Cavity Filter. More details for SiMS22R4/1R2-5P2 can be seen below.