The BWHF-20G from Sainty-Tech Communications Limited is a RF High Pass Filter with Frequency 20 to 40 GHz, Insertion Loss 1.9 dB @20.0GHz, Power 30 dBm, Rejection 20 dB @14.7GHz, 40 dB @13.7GHz, Lower Rejection 20 to 40 dB. Tags: Die. More details for BWHF-20G can be seen below.