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You searched on: Topic Area: Electromagnetics

Displaying records 1 to 10 of 76 records.
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1. RF PASS: System Test Results and an Update on Test Methods for Standards
Topic: Electromagnetics
Published: 10/30/2015
Authors: William F Young, Catherine A Remley, Jacob L. Healy

2. Using the Amplitude Variation of a Reverberation Chamber Channel to Predict the Synchronization of a Wireless Digital Communication Test System
Topic: Electromagnetics
Published: 8/16/2015
Authors: Ray R Tanuhardja, Luis Alberto Gonzalez, Chih-Ming Wang, William F Young, Catherine A Remley
Abstract: This contribution discusses the use of a metric based on the amplitude variation of a channel in the signal bandwidth to predict whether or not a digital wireless communication test system receiver will be able to demodulate a test signal. This metri ...

3. A Differential Form of the Kramers-Kronig Relation for Determining a Lorentz-Type of Refractive Index
Topic: Electromagnetics
Published: 7/22/2015
Authors: Sung Kim, David R Novotny, Joshua A Gordon, Jeffrey R Guerrieri
Abstract: The integral forms of the Kramers-Kronig (KK) relations that relate the real and imaginary parts, n' and n", of a refractive index require the integral to be conducted over the full spectrum. In this paper, we derive a differential form of the KK rel ...

4. Interference and Coexistence of Wireless Systems in Critical Infrastructure
Series: Technical Note (NIST TN)
Report Number: 1885
Topic: Electromagnetics
Published: 7/7/2015
Authors: Galen H Koepke, William F Young, John M Ladbury, Jason B Coder
Abstract: We examine interference and coexistence testing issues, test methods, and the need to update and develop new test methodologies related to the use of wireless devices in critical infrastructure systems. A case study on interference is presented ...

5. Experimental Bounds on Classical Random Field Theories
Topic: Electromagnetics
Published: 12/10/2014
Authors: Joffrey Kent Peters, Sergey V Polyakov, Jingyun Fan, Alan L Migdall
Abstract: Alternative theories to quantum mechanics motivate important fundamental tests of our understanding and description of the smallest physical systems. Here we place experimental limits on those classical field theories which result in power-depend ...

6. Parameter Estimation and Uncertainty Evaluation in a Low Rician K-Factor Reverberation-Chamber Environment
Topic: Electromagnetics
Published: 10/15/2014
Authors: Chih-Ming Wang, Catherine A Remley, Ansgar T. Kirk, Ryan J. Pirkl, Christopher L Holloway, Dylan F Williams, Paul D Hale
Abstract: In this paper we study statistical methods for estimating the Rician K-factor when this parameter is small. A fiducial approach for making statistical inference on the K-factor is discussed. The approach requires a Monte Carlo method to compute the u ...

7. Amplifier and Transistor Noise-Parameter Measurements
Topic: Electromagnetics
Published: 10/1/2014
Author: James Paul Randa
Abstract: Methods for measuring the noise parameters of amplifiers and on-wafer transistors are reviewed. After some preliminary background information and conventions, noise parameters are defined and the most common measurement strategies are presented, bot ...

8. 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 ...

9. Dielectric characterization by microwave cavity perturbation corrected for non-uniform fields
Topic: Electromagnetics
Published: 7/23/2014
Authors: Nathan D Orloff, Jan Obrzut, Christian John 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. ...

10. Traceability for Millimeter and Submillimeter-Wave Power Measurements
Topic: Electromagnetics
Published: 5/21/2014
Author: Ronald A Ginley
Abstract: The need for traceable power measurements above 110 GHz is well established for use in communications, spectral line investigation, molecular particle signature identification, material property characterization and others. There have been increment ...

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