The TSM1840 from Narda-MITEQ is a RF Amplifier with Frequency 1.8 to 4 GHz, Gain 22 dB, Gain Flatness ± 3 dB, Noise Figure 4.5 dB, Output Power 5 dBm. Tags: Surface Mount, Power Amplifier, Low Noise Amplifier. More details for TSM1840 can be seen below.