Human Presence Detection Using Millimeter-Wave Radiometry

A Three-Frequency Feed for Millimeter-Wave Radiometry

multiband modeling of quantum electron transport through layered semiconductor devices, catalyst activity of water-assisted growth of single walled carbon nanotube forest characterization by a statistical and macroscopic approach, ABSTRACT: A high-performance millimeter-wave feed, designed for a broad-band radiometry application is presented. The feed provides three separate output ports in the...

Detection of the Vibration Signal from Human Vocal Folds Using a 94-GHz Millimeter-Wave Radar

The detection of the vibration signal from human vocal folds provides essential information for studying human phonation and diagnosing voice disorders. Doppler radar technology has enabled the noncontact measurement of the human-vocal-fold vibration. However, existing systems must be placed in close proximity to the human throat and detailed information may be lost because of the low operating...

Ground-based millimeter and submillimeter-wave radiometry for the observation of the Arctic atmosphere

Microwave radiometers working at millimeter and submillimeter wavelengths show enhanced sensitivity to low contents of water vapor and cloud liquid in the atmosphere with respect to conventional radiometers working at centimeter wavelengths. This enhanced sensitivity gives particular interest to high-frequency radiometers for the accurate observations in extreme dry and cold conditions typical ...

Thermal Analysis of Graphite and Silicon Carbide with Millimeter-Wave Radiometry

Millimeter-wave thermal analysis instrumentation is being developed for characterization of high temperature materials required for diverse fuel and structural needs in extreme high temperature reactor environments. A two-receiver 137 GHz system with orthogonal polarizations for anisotropic properties resolution has been implemented at MIT and is being tested with graphite and silicon carbide s...

Fluid-level sensing using 77GHz millimeter wave