The BWHF-3G from Sainty-Tech Communications Limited is a RF High Pass Filter with Frequency 3 to 21 GHz, Insertion Loss 1.7 dB @3.0GHz, Power 30 dBm, Rejection 20 dB @1.82GHz, 40 dB @1.62GHz, Lower Rejection 20 to 40 dB. Tags: Die. More details for BWHF-3G can be seen below.