The LFCN-2952 from Mini Circuits is a Low Pass RF Filter with Frequency DC to 29.5 GHz, Stopband Frequency 36 to 48 GHz, 3 dB Cutoff Frequency 31 GHz, Insertion Loss 0.7 to 2.1 dB, Rejection 20 to 42 dB. Tags: Surface Mount, Ceramic Filter. More details for LFCN-2952 can be seen below.