The PA4037 from MtronPTI is a RF Amplifier with Frequency 18 to 40 GHz, Small Signal Gain 40 dB, Gain Flatness ± 6 dB, Noise Figure 10 dB, Output Power 38.45 to 40 dBm. Tags: Benchtop / Rackmount, Power Amplifier. More details for PA4037 can be seen below.