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Displaying records 671 to 680 of 753 records.
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671. TEM Horn Antenna Design Principles
Series: Technical Note (NIST TN)
Report Number: 1544
Topic: Electronics & Telecommunications
Published: 1/23/2007
Authors: Chriss A. Grosvenor, Robert T. Johnk, David R Novotny, Nino Canales, Benjamin Davis, Jason Veneman
Abstract: The National Institute of Standards and Technology has developed several ultra-wideband, TEM Horn antennas with phase linearity, short impulse duration, and a near constant antenna factor. These are time-domain antennas used to measure impulsive fiel ...

672. TEM horn antennas: A promising new technology for compliance testing
Topic: Electronics & Telecommunications
Published: 8/1/2004
Authors: Chriss A. Grosvenor, Robert T. Johnk, David R Novotny, Seturnino Canales
Abstract: Abstract-This paper discusses the advantages of using a TEM-horn antenna over conventional EMC antennas such as the log-periodic, hybrids, or biconical antennas. Important issues such as frequency coverage, linearity, time-resolution of events, cost, ...

673. Temperature-dependent mechanical-resonance frequencies and damping in ensembles of gallium nitride nanowires
Topic: Electronics & Telecommunications
Published: 10/22/2012
Authors: Kristine A Bertness, Norman A Sanford, J. R. Montague, H.S. Park, Victor M. Bright, C. T. Rogers
Abstract: We have measured singly clamped cantilever mechanical-resonances in ensembles of as-grown gallium nitridenanowires (GaN NWs), from 12 K to 320 K. Resonance frequencies are approximately linearly dependent on temperature near 300 K ...

674. Terahertz imaging and spectroscopy based on hot electron bolometer (HEB) heterodyne detection
Topic: Electronics & Telecommunications
Published: 1/23/2008
Authors: Eyal Gerecht, Lixing You
Abstract: Imaging and spectroscopy at terahertz frequencies have great potential for healthcare, plasma diagnostics, and homeland security applications. Terahertz frequencies correspond to energy level transitions of important molecules in biology and astrophy ...

675. Terahertz radiometer design for traceable noise-temperature measurements
Topic: Electronics & Telecommunications
Published: 7/14/2006
Authors: Eyal Gerecht, Dazhen Gu, James Paul Randa, David K Walker, Robert L Billinger
Abstract: We report on design of a radiometer for traceable noise-temperature measurements at terahertz frequencies, including noise measurements on cryogenic IF components, development and test of quasi-optical adapter technology, development of black body st ...

676. Textile Composites: Modelling Strategies
Topic: Electronics & Telecommunications
Published: 1/1/2001
Authors: S V Lomov, G Huysmans, Y Luo, Richard~undefined~undefined~undefined~undefined~undefined Parnas, A Prodromou, I Verpoest, Frederick R Phelan Jr

677. The ABCs of Using Standard Reference Materials in the Analysis of Foods and Dietary Supplements: A Practical Guide
Series: Special Publication (NIST SP)
Report Number: 260-181
Topic: Electronics & Telecommunications
Published: 6/2/2014
Authors: Katherine E Sharpless, David Lee Duewer, Katrice A Lippa, Andrew L Rukhin
Abstract: Although ,nutraceuticals‰ and ,functional foods‰ seem to be ill-defined terms, both are often used to indicate a food that contains compounds providing benefits beyond basic nutrition, often with the expectation that these compounds are protectiv ...

678. The Application of Optical Coherence Tomography to Problems in Polymer Matrix Composites
Topic: Electronics & Telecommunications
Published: 1/1/2001
Authors: Joy P Dunkers, Frederick R Phelan Jr, D P Sanders, M J Everett, William H. Green, Donald Lee Hunston, Richard~undefined~undefined~undefined~undefined~undefined Parnas
Abstract: The Composites Group at the National Institute of Standards and Technology has found optical coherence tomography (OCT) to be a powerful tool for non-destructive characterization of polymer matrix composites. Composites often exhibit superior proper ...

679. The Dependence of the Thermal Electron Attachment Rate Constant in Gases and Liquids on the Energy Position of the Electron Attaching State
Topic: Electronics & Telecommunications
Published: 11/1/1996
Author: Loucas G. Christophorou

680. The Determination of Near-Field Correction Parameters forCircularly Polarized Probes
Topic: Electronics & Telecommunications
Published: 10/1/1984
Authors: Allen C. Newell, Michael H Francis, D P Kremer

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