The QBF-2573.5-2626.5-40 from Qualwave is a Band Pass Filter with Frequency 2.5735 to 2.6265 GHz, Bandwidth 53 MHz, Center Frequency 2600 MHz, Insertion Loss 0.8 dB, Upper Rejection 40 [email protected] GHz. Tags: Module with Connectors. More details for QBF-2573.5-2626.5-40 can be seen below.