The PSF19B03S from Nuvotronics, Inc. is a Band Pass Filter with Frequency 17.7 to 21.2 GHz, Bandwidth 3500 MHz, Center Frequency 19450 MHz, Insertion Loss 0.9 to 1.5 dB, Upper Rejection 50 to 75 [email protected] to 40.4 GHz. Tags: Surface Mount. More details for PSF19B03S can be seen below.