The FMFL020 from Fairview Microwave is a Low Pass RF Filter with Frequency DC to 1000 MHz, Stopband Frequency 1.5 to 2 GHz, 3 dB Cutoff Frequency 1000 MHz, Insertion Loss 1 dB, Upper Rejection 40 to 60 [email protected] to 2 GHz. Tags: Module with Connector. More details for FMFL020 can be seen below.