The QBF-2037.5-2272.5-50 from Qualwave is a Band Pass Filter with Frequency 2.0375 to 2.2725 GHz, Bandwidth 235 MHz, Center Frequency 2155 MHz, Insertion Loss 2 dB, Upper Rejection 50 to 80 dB. Tags: Module with Connectors. More details for QBF-2037.5-2272.5-50 can be seen below.