The SiMS20R35/1R9-8D2 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 19.4 to 21.3 GHz, Center Frequency 20.35 GHz, Insertion Loss 2.5 dB, Rejection 30 dB @18.4GHz&22.3GHz, 40 dB @18GHz&22.5GHz, 50 dB @DC~17.5GHz, 50 dB @23~25GHz, Upper Rejection 30 to 50 dB. Tags: Surface Mount, Cavity Filter. More details for SiMS20R35/1R9-8D2 can be seen below.