Publications Portal

You searched on:
Topic Area: Electromagnetics

Your search results exceeded 1,000 records. Please refine your search and try again.
Displaying records 61 to 70 of 1000 records.
Resort by: Date / Title

61. Evaluation of Nonlinear Distortion in ADCs Using Multisines
Topic: Electromagnetics
Published: 6/15/2008
Authors: Catherine A Remley, Nuno Carvalho, Pedro Cruz
Abstract: This paper characterizes nonlinear distortion in an analog-to-digital converter (ADC) when it is excited by representative communication signals having non-constant time-domain envelopes. The effect of subjecting the ADC to signals that present a ran ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32862

62. ANTENNA TEST RANGE IMAGING USING SPHERICAL NEAR-FIELD SCANNING
Topic: Electromagnetics
Published: 6/8/2008
Authors: Michael H Francis, Ronald Curtis Wittmann, Randy Direen
Abstract: Although the theory is straightforward, practical implementation of spherical near-field scanning for evaluating test chambers presents some significant challenges. Among these are the selection of an appropriate probe and the difficulty in minimizin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32929

63. Calibrated Broadband Electrical Characterization of Nanowires
Topic: Electromagnetics
Published: 6/8/2008
Authors: Thomas M Wallis, Atif Imtiaz, Hans Toya Nembach, Kristine A Bertness, Norman A Sanford, Paul Timothy Blanchard, Pavel Kabos
Abstract: A technique is presented for the broadband electrical characterization of nanowires. The technique relies on established on-wafer calibration methods as well as a direct measurement of the capacitive coupling that is in parallel with the nanowire adm ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32896

64. Design and Correction Factor Evaluation of a WR-15 (50 to 75 GHz) Microcalorimeter
Topic: Electromagnetics
Published: 6/8/2008
Authors: Thomas P Crowley, Xiaohai Cui
Abstract: The design and evaluation of a WR-15 (50 to 75 GHz) rectangular waveguide microcalorimeter is presented. This new microcalorimeter will be the national standard for power in the US from 50 to 75 GHz. It can measure the effective efficiency of a wider ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32895

65. Permittivity and Permeability and the Basis of Effective Parameters
Topic: Electromagnetics
Published: 6/8/2008
Authors: James R. Baker-Jarvis, Michael D Janezic, Bill F Riddle
Abstract: The concepts of effective permittivity and permeability are used throughout the literature to describe both highly heterogeneous materials, inhomogeneous materials, and small collections of molecules. In this paper we study definitions of the permitt ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32877

66. Uncertainty Analysis for Noise-Parameter Measurements
Topic: Electromagnetics
Published: 6/8/2008
Author: James Paul Randa
Abstract: A brief summary is presented for the uncertainty analysis for measurements of noise parameters of amplifiers and transistors, in both connectorized (coaxial) and on-wafer environments. We treat both the X-parameters, which are based on the wave repre ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32904

67. Mixed Analog-Digital Instrumentation for Software Defined Radio Characterization
Topic: Electromagnetics
Published: 6/5/2008
Authors: Catherine A Remley, Nuno Carvalho, Pedro Cruz, Kevin Gard
Abstract: This paper presents a new type of analog-digital mixed-domain instrument that is specially tailored for software defined radio characterization. The instrument allows the utilization of analog instruments such as vector signal analyzers and network a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32863

68. Radio Communications for Emergency Responders in High-Multipath Outdoor Environments
Topic: Electromagnetics
Published: 6/2/2008
Authors: Catherine A Remley, Galen H Koepke, Christopher L Holloway, Chriss A. Grosvenor, Dennis G Camell
Abstract: We present measurement data to support technology and standards development for broadband, digitally modulated radio communications used by emergency responders. Measurements were carried out at an oil refinery, representing a class of high-multipath ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32998

69. On the Use of Dipole Models to Correlate Emission Limits Between EMC Test Facilities
Topic: Electromagnetics
Published: 5/19/2008
Author: Perry F. Wilson
Abstract: Simple formulas are developed that enable emission limits from one EMC facility type to be translated to other EMC facility types. Facility types considered are free space, a half space as represented by an open area test site or a semi-anechoic cham ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32997

70. A Passive Heterodyne HEB Imager Operating at 850 GHz
Topic: Electromagnetics
Published: 5/15/2008
Authors: Eyal Gerecht, Dazhen Gu, Lixing You, Sigfrid Yngvessen
Abstract: We report the development and characterization of a passive heterodyne hot electron bolometer (HEB) imager operating at 850 GHz. HEB detectors provide unprecedented sensitivity and spectral resolution at terahertz frequencies covering the frequency r ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32749