The BWLF-23G from Sainty-Tech Communications Limited is a Low Pass RF Filter with Frequency DC to 23 GHz, 3 dB Cutoff Frequency 23 GHz, Insertion Loss 2.2 dB @23GHz, Rejection 20 dB @28GHz, 40 dB @29.5GHz, Power 30 dBm. Tags: Die. More details for BWLF-23G can be seen below.