The QBF-3400-3600-30 from Qualwave is a Band Pass Filter with Frequency 3.4 to 3.6 GHz, Bandwidth 200 MHz, Center Frequency 3500 MHz, Insertion Loss 1.5 dB, Upper Rejection 30 [email protected] to 8 GHz. Tags: Module with Connectors. More details for QBF-3400-3600-30 can be seen below.