The MMG3H21NT1 from NXP Semiconductors is a RF Amplifier with Frequency 1 MHz to 6 GHz, Power Gain 19.3 dB, Small Signal Gain 19.3 dB, Noise Figure 5.5 dB, Output Power 20.5 dBm. Tags: Surface Mount, Power Amplifier. More details for MMG3H21NT1 can be seen below.