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You searched on: Topic Area: Electromagnetics

Displaying records 11 to 20 of 54 records.
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11. A SMALL-SAMPLE, BI-DIRECTIONAL SCATTERING MEASUREMENT SYSTEM FROM 200-500 GHz
Topic: Electromagnetics
Published: 10/26/2012
Authors: David R Novotny, Joshua A Gordon, Edwin J Heilweil, Brian C. Stillwell, Jeffrey R Guerrieri, Erich N Grossman, Shu Zee A. Lo
Abstract: Beginning the fall of 2012, NIST will be providing scattering measurements for other government agencies. We present performance results of a bi-directional scattering measurement system in the 200-500 GHz range. The goal is to provide dense-spectru ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911923

12. A Large-Signal Model of Ferroelectric Thin-Film Transmission Lines"
Topic: Electromagnetics
Published: 12/1/2011
Authors: Eduard Rocas, Juan C. Collado Gomez, Jordi Mateu, Nathan D Orloff, James C Booth, Juan Manuel O'C allaghan
Abstract: "This work evaluates the microwave nonlinear properties and tuning at RF frequencies of ferroelectric Ba0.3Sr0.7TiO3 thin-films by on-wafer measurements of the second and third-order harmonics and intermodulation products of several coplanar transmis ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907951

13. Verification of Noise-Parameter Measurements and Uncertainties
Topic: Electromagnetics
Published: 11/1/2011
Authors: James Paul Randa, Dazhen Gu, David K Walker
Abstract: We propose and implement verification methods for measurements of noise parameters of amplifiers and transistors. Because the verification rests on the comparison of different measurement results, it also serves as a test of the uncertainties. The ve ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904668

14. The Reverberation Chamber's Unstirred Field: A Validation of the Image Theory Interpretation
Topic: Electromagnetics
Published: 8/15/2011
Authors: Ryan J. Pirkl, John M Ladbury, Catherine A Remley
Abstract: Synthetic aperture measurements of a reverberation chamber's unstirred wireless channel are used to compare the observed power, time-of-arrival, and angle-of-arrival of unstirred multipath components to that predicted by ray/image theory for a re ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907962

15. O2 A-band line parameters to support atmospheric remote sensing. Part II: The rare isotopologues
Topic: Electromagnetics
Published: 7/21/2011
Authors: Joseph Terence Hodges, David A Long, Daniel K Havey, S. S. Yu, M Okumura, Charles E Miller
Abstract: Frequency-stabilized cavity ring-down spectroscopy (FS-CRDS) was employed to measure over 100 transitions in the R-branch of the b1Σg+←X3Σg-(0,0) band for the rare O2 isotopologues. The use of 17O- and 18O-enriched mixtures allowed fo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907932

16. 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 Timothy 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

17. Boundary Effects on the Determination of the Effective Parameters of a Metamaterial from Normal Incidence Reflection and Transmission
Topic: Electromagnetics
Published: 6/1/2011
Authors: Sung Kim, Edward E. Kuester, Christopher L Holloway, James R. Baker-Jarvis, Aaron D. Scher
Abstract: This paper presents a method for the determination of the effective electromagnetic parameters of a metamaterial, taking boundary effects at the interfaces between a conventional material and metamaterial into account. In the technique presented here ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904074

18. Microwave Characterization of Transparent Conducting Films
Topic: Electromagnetics
Published: 5/26/2011
Authors: Jan Obrzut, Oleg A Kirillov
Abstract: The high frequency conductivity of thin metallic and graphitic nano-films attracts interest due to many potential applications in spin electronics, electromagnetic shielding, flexible antennas, displays, and solar cells. The surface morphology of thi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907453

19. NIST's High Frequency Metrology Program: Current Capabilities and Future Directions
Topic: Electromagnetics
Published: 3/31/2011
Author: Ronald A Ginley
Abstract: There are several core areas that are covered by the NIST microwave metrology services. These include thermal noise, power, scattering-parameters (s-parameters), field strength and antenna parameters. The rapid change in technology and the current ec ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907842

20. Quantitative Permittivity Measurements of Nanoliter Liquid Volumes in Microfluidic Channels to 40 GHz.
Topic: Electromagnetics
Published: 12/1/2010
Authors: James C Booth, Nathan D Orloff, Jordi Mateu, James A Beall, Matthew Rinehart
Abstract: We describe the design, fabrication, and evaluation of a new on-wafer measurement platform for the rapid, quantitative determination of the complex permittivity of nL fluid volumes over the frequency range from 10 MHz - 40 GHz. Our measurement platfo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903958



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