The PSF19B02S from Nuvotronics, Inc. is a Band Pass Filter with Frequency 17.7 to 20.2 GHz, Bandwidth 2500 MHz, Center Frequency 18950 MHz, Insertion Loss 2 dB, Upper Rejection 30 to 40 [email protected] to 50 GHz. Tags: Surface Mount. More details for PSF19B02S can be seen below.