The QBF-1800-2200-45 from Qualwave is a Band Pass Filter with Frequency 1.8 to 2.2 GHz, Bandwidth 400 MHz, Center Frequency 2000 MHz, Insertion Loss 1.2 dB, Upper Rejection 45 [email protected] GHz. Tags: Module with Connectors. More details for QBF-1800-2200-45 can be seen below.