The 80/40S1G18 from AR RF/Microwave Instrumentation is a RF Amplifier with Frequency 700 MHz to 4.2 GHz, Gain 49 dB, Gain Flatness ±2 dB, Noise Figure 10 dB, Output Power 48.45 to 49.29 dBm. Tags: Power Amplifier. More details for 80/40S1G18 can be seen below.