The BFCQ-1892+ from Mini Circuits is a Band Pass Filter with Frequency 17.7 to 20.2 GHz, Center Frequency 18.95 gHz, Insertion Loss 1.4 to 3 dB, Upper Rejection 35 to 50 dB, Lower Rejection 30 to 55 dB. Tags: Ceramic, Ceramic Filter. More details for BFCQ-1892+ can be seen below.