The ATEK845P3 from ATEK MIDAS is a Low Pass RF Filter with Frequency DC to 16 GHz, Stopband Frequency 21.2 to 22.1 GHz, Insertion Loss 0.5 to 3 dB, Upper Rejection 40 to 50 dB @ 21.2 GHz, 22.1 GHz, Return Loss -21 to -19 dB. Tags: Surface Mount. More details for ATEK845P3 can be seen below.