The BWHF-28G from Sainty-Tech Communications Limited is a RF High Pass Filter with Frequency 28 to 40 GHz, Insertion Loss 2.3 dB @28.0GHz, Power 30 dBm, Rejection 40dB dB @100MHz to 19.5GHz, Lower Rejection 40 dB. Tags: Die. More details for BWHF-28G can be seen below.