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Displaying records 21 to 30 of 90 records.
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21. Design and Testing of NFRad - A New Noise Measurement System
Series: Technical Note (NIST TN)
Report Number: 1518
Topic: Electromagnetics
Published: 3/1/2000
Authors: Chriss A. Grosvenor, James Paul Randa, Robert L. Billinger
Abstract: The NIST Noise project has constructed and tested a new, automated, coaxial (GPC-7) radiometer for the measurement of noise sources in the 8-12 GHz frequency band. It is an isolated, total-power radiometer that relies on lookup tables for relevant re ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=6264

22. Dielectric characterization by microwave cavity perturbation corrected for non-uniform fields
Topic: Electromagnetics
Published: 7/23/2014
Authors: Nathan D Orloff, Jan Obrzut, Christian J Long, Thomas F. Lam, James C Booth, David R Novotny, James Alexander Liddle, Pavel Kabos
Abstract: The non-uniform fields that occur due to the slot in the cavity through which the sample is inserted and those due to the sample geometry itself decrease the accuracy of dielectric characterization by cavity perturbation at microwave frequencies. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915011

23. Dielectrofluidics for Electronic-Based Chemical and Particle Analysis
Topic: Electromagnetics
Published: 8/18/2014
Authors: James C Booth, Spencer Thomas Egan, Charles Anderson Enright Little, A Padilla, Yu Y. Wang, Nathan D Orloff
Abstract: The interactions of electromagnetic fields with matter are described by means of the polarization and magnetization of the material under study. Analogous to the way that magnetofluidics seeks to exploit magnetic interactions for sensing and manipula ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916399

24. EEEL Technical Accomplishments
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7568
Topic: Electromagnetics
Published: 3/30/2009
Author: Erik M Secula
Abstract: This document describes the technical work of the Electronics and Electrical Engineering Laboratory. In this report, you will find that EEEL researchers are developing the world's most advanced sensors, providing advanced gamma ray imagers for astro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901701

25. Effective Material Property Extraction Of a Metamaterial by Taking Boundary Effects into Account At TE/TM Polarized Incidence
Topic: Electromagnetics
Published: 9/22/2011
Authors: Sung Kim, Christopher L Holloway, James R. Baker-Jarvis, Edward Kuester, Kendra L. Kimberly
Abstract: In this paper, we present the extraction for effective material parameters for a metamaterial from TE or TM waveguide measurements with generalized sheet transition conditions (GSTCs) used to provide electric and magnetic surface susceptibilities th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908471

26. Effective Material Property Extraction of a Metamaterial by taking boundary effects into account at TE/TM polarized incidence
Topic: Electromagnetics
Published: 1/31/2012
Authors: Sung Kim, Christopher L Holloway, James R. Baker-Jarvis, Edward Kuester, A D Scher
Abstract: In this paper, we present the extraction for effective material parameters for a metamaterial from TE or TM waveguide measurements with generalized sheet transition conditions (GSTCs)used to provide electric and magnetic surface susceptibilities that ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908652

27. Electrical Characterization of Photoconductive GaN Nanowire Devices from 50 MHz to 33 GHz
Topic: Electromagnetics
Published: 7/1/2011
Authors: Thomas M Wallis, Dazhen Gu, Atif A. Imtiaz, Pavel Kabos, Paul T Blanchard, Norman A Sanford, Kristine A Bertness, Christpher Smith
Abstract: The electrical response of two-port., photoconductive GaN nanowire devices was measured from 50 MHz to 33 GHz. The admittance of individual contacted nanowires showed an increase on the order of 10% throughout the measured frequency range after expo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903093

28. Electromagnetic Penetration Studies for Three Different Aircraft
Topic: Electromagnetics
Published: 8/17/2009
Authors: Chriss A. Grosvenor, David R Novotny, Dennis G. Camell, Galen H. Koepke, Robert Johnk, Nino Canales
Abstract: The National Institute of Standards and Technology has completed penetration studies on three different aircraft for the Federal Aviation Administration. These studies are used to understand cavity coupling characteristics between antennas placed at ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902354

29. Estimating Uncertainties in Antenna Measurements
Topic: Electromagnetics
Published: 4/8/2013
Author: Michael H Francis
Abstract: We describe general methods of estimating uncertainties in antenna measurements. These include estimates based on theory (analysis1), simulation, and altering the measurement system (self-coparison tests). The important component sources of uncertain ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913006

30. Evaluation of a Robotically Controlled Millimeter-Wave Near-Field Pattern Range at NIST Determining mechaincal suitability for antenna measurements
Topic: Electromagnetics
Published: 4/8/2013
Authors: David R Novotny, Joshua A Gordon, Jason B Coder, Michael H Francis, Jeffrey R Guerrieri
Abstract: The Antenna Metrology Laboratory at the National Institute of Standards and Technology, USA (NIST) is developing a robotically controlled near-field pattern range for measuring antennas and components from 50 GHz to 500 GHz. This new range is intende ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913071



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