The ATEK858N4 from ATEK MIDAS is a Band Pass Filter with Frequency 22.3 to 23.5 GHz, Bandwidth 1200 MHz, Center Frequency 22900 MHz, Insertion Loss 4.9 to 5.3 dB, Upper Rejection 40 dBc @ 26.8 GHz. Tags: Surface Mount. More details for ATEK858N4 can be seen below.