Tessmann, AxelAxelTessmannHaydl, W.W.HaydlNeumann, M.M.NeumannRüdiger,J.Rüdiger2022-03-032022-03-032000https://publica.fraunhofer.de/handle/publica/19720110.1109/75.850373W-band amplifier modules with high gain and large bandwidth have been developed for passive imaging applications. With three cascaded waveguide modules, an average small-signal gain of 60 dB and a +-3 dB bandwidth of 15 GHz was achieved centered around 94 GHz. The assembled three-stage amplifier monolithic microwave integrated circuits are realized in coplanar technology for compact size and low cost. Cascode devices, based on a 0.15 mu m AIGaAs/InGaAs/GaAs pseudomorphic high electron mobility transistor technology, allow for individual gain control of the stages by varying the second gate voltage.encascodeKaskodecoplanar waveguideKoplanarleitungmillimeter waveMillimeterwellemonolithic microwave integrated circuitsmonolithisch integrierte MillimeterwellenschaltungMMICpassive imagingpassive bildgebende Sensoren621667journal article