The L51 Series LNA from Communications & Power Industries is a RF Amplifier with Frequency 3.4 to 4.2 GHz, Gain 50 to 60 dB, Output Power 10 to 20 dBm, Output Power 0.01 to 0.1 W, Saturated Power 10 to 20 dBm. Tags: Low Noise Amplifier. More details for L51 Series LNA can be seen below.