The QBF-1100-1600-50 from Qualwave is a Band Pass Filter with Frequency 1.1 to 1.6 GHz, Bandwidth 500 MHz, Center Frequency 1350 MHz, Insertion Loss 2.5 dB, Upper Rejection 50 [email protected] GHz. Tags: Module with Connectors. More details for QBF-1100-1600-50 can be seen below.