A fully encapsulated waveguide coupled passive imaging W-band radiometer module with RF frontend IC in a SiGe-BiCMOS technology

Heterodyne and direct detection radiometer receivers at 94 GHz have been realized in a 130 nm Si/SiGe BiCMOS process. They have been assembled into fully self-contained metal housings with a waveguide flange for the antenna connection. The receivers, which employ a SiGe LNA with below 4 dB noise figure, show overall responsivities of 620 μV/K and 380 μV/K respectively.

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