Michael Sholley, Gregory Barber, Rohit Raja, Bruce Osgood, Ronald Grundbacher, Richard Lai, Robert Haas, Paul Lee, Mike Barsky, Matt Nishimoto, Linda Reed, Ming Jong Shiau, Robert Lyons, Farman Mesdagli, Randolph Quon, Robert Whittemore
This paper describes the design and development of a state-of-the-art dual-channel 183 GHz InP based Monolithic Microwave Integrated Circuit (MMIC) radiometer. This is the world's first reported monolithic radiometer that operates at 183 GHz enabling high precision micro-miniature sensing of atmospheric chemistry components in this band. The radiometer features the following key components: a plug-in front end low noise amplifier module utilizing a broadband InP MMIC that sets the system noise figure, a low loss waveguide diplexer module, waveguide-to-microstrip transitions fabricated on Z-cut quartz, a mechanical design that can be easily modified to be hermetic, dual-channel output allowing double sideband detection, and a combination of HEMT and HBT InP and GaAs MMIC active components.
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