The L81 Series LNA from Communications & Power Industries is a RF Amplifier with Frequency 19.2 to 21.2 GHz, Gain 45 to 50 dB, Output Power 5 dBm, Output Power 0.003 W, Saturated Power 5 dBm. Tags: Low Noise Amplifier. More details for L81 Series LNA can be seen below.