The QBF-21500-22500-70 from Qualwave is a Band Pass Filter with Frequency 21.5 to 22.5 GHz, Bandwidth 1000 MHz, Center Frequency 22000 MHz, Insertion Loss 2 dB, Upper Rejection 70 dB @23.1 to 40 GHz. Tags: Module with Connectors. More details for QBF-21500-22500-70 can be seen below.