The LFCW-1142+ from Mini Circuits is a Low Pass RF Filter with Frequency DC to 11.4 GHz, 3 dB Cutoff Frequency 11.7 GHz, Insertion Loss 2.6 dB, Rejection 20 to 28.5 dB, Upper Rejection 20 to 28.5 dB. Tags: Surface Mount, Ceramic Filter. More details for LFCW-1142+ can be seen below.