The JS4-18004000-45-8P from Narda-MITEQ is a RF Amplifier with Frequency 18 to 40 GHz, Gain 23 dB, Gain Flatness ± 2.5 dB, Noise Figure 4.5 dB, P1dB 8 dBm. Tags: Power Amplifier, Low Noise Amplifier. More details for JS4-18004000-45-8P can be seen below.