The BWHF-18G from Sainty-Tech Communications Limited is a RF High Pass Filter with Frequency 18 to 39 GHz, Insertion Loss 2.2 dB @18.0GHz, Power 30 dBm, Rejection 20 dB @13.7GHz, 40 dB @12.9GHz, Lower Rejection 20 to 40 dB. Tags: Die. More details for BWHF-18G can be seen below.