The QBF-5700-5900-45 from Qualwave is a Band Pass Filter with Frequency 5.7 to 5.9 GHz, Bandwidth 200 MHz, Center Frequency 5800 MHz, Insertion Loss 1.8 dB, Upper Rejection 45 [email protected] GHz. Tags: Module with Connectors. More details for QBF-5700-5900-45 can be seen below.