The CHA2391-99F from United Monolithic Semiconductors is a RF Amplifier with Frequency 36 to 40 GHz, Gain 12 to 15 dB, Gain Flatness ±0.5 to 1 dB, Noise Figure 2.5 to 3 dB, Output Power 12 dBm. Tags: Low Noise Amplifier. More details for CHA2391-99F can be seen below.