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Bad Tunnel Diode Enables Good Millimeter-Wave Sensor

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Hank Hogan

By realizing that a bad tunnel diode could form the basis for a good sensor, researchers at Ohio State University in Columbus, the US Naval Research Laboratory in Washington and the University of Notre Dame in Indiana may have found a new technology to detect concealed weapons without x-rays. A variation of the same approach could allow pilots to see through bad weather. The sensor works on ambient radiation at 94 GHz — corresponding to a wavelength of 3.2 mm, or 3200 µm. At this wavelength, the atmosphere is transparent, and scattering from rain, fog, smoke, clothing and other materials...Read full article

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    Published: October 2005
    ambient radiationbad tunnel diodeOhio State UniversityResearch & TechnologySensors & DetectorsTech Pulse

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