The DBP-4042N821 from Stellant Systems is a RF Amplifier with Frequency 40.5 to 42.5 GHz, Gain 20 to 26 dB, Gain Flatness ±1.5 dB, Noise Figure 7.5 to 8.5 dB, Output Power 21 dBm. Tags: Hermetic, Power Amplifier. More details for DBP-4042N821 can be seen below.