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Electronics

Electromagnetics

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Displaying 976 - 1000 of 1583

Ferromagnetic Resonance Detection with a Torsion-mode Atomic-force Microscope

February 1, 2000
Author(s)
M. Loehndorf, John M. Moreland, Pavel Kabos
We have developed a ferromagnetic resonance (FMR) instrument based on a torsion-mode atomic-force microscope (AFM). The instrument measures the torque on a magnetized thin film in a static out-of-plane field perpendicular to the film surface. The magnetic

RF Material Characterization Using a Large-Diameter (76.8 mm) Coaxial Air Line

February 1, 2000
Author(s)
Chriss A. Jones, John H. Grosvenor Jr, Claude Weil
We report the development of a 76.84 mm (3.025 in) diameter coaxial air line system whose purpose is to measure the dielectric and magnetic properties of bulk dielectric and ferrite materials over a frequency range of approximately 0.3 - 1500 MHZ. We

Acceptor Doping of Barium Strontium Titanate and Magnesium Oxide Composites

January 1, 2000
Author(s)
J. Synowczynski, G. Dewing, Richard G. Geyer, John H. Grosvenor Jr
The microwave dielectric properties of bulk barium strontium titanate and magnesium oxide ceramic composites are measured with cylindrical mode-filtered cavity and dielectric sleeve resonator techniques. The cylindrical wall of the mode- filtered cavity

NIST Unveils Status of PIM Testing

January 1, 2000
Author(s)
Jeffrey Jargon, Donald C. DeGroot
In response to requests by U.S. industry and members of the International Electrotechnical Commision, the National Institute of Standards and Technology initiated a passive intermodualtion measurement comparison for the U.S. wireless industry. The goal of

Equivalent Circuit Models for Coaxial OSLT Standards

December 1, 1999
Author(s)
Donald C. DeGroot, K. L. Reed, Jeffrey Jargon
We use a general description of transmission lines to develop analytic descriptions for offset OSLT (Open-Short-Load-Thru) standards used to calibrate vector network analyzers.

Nose-to-Nose Response of a 20-GHz Sampling Circuit

December 1, 1999
Author(s)
Dylan F. Williams, Catherine A. Remley, Donald C. DeGroot
We use SPICE simulations to determine a response function of a two-diode 20-GHz sampling circuit. We explore the validity of the SPICE simulations in a variety of operational conditions and examine differences between the actual response of an impedance

On-Wafer Measurements of Noise Temperature

December 1, 1999
Author(s)
James P. Randa, Robert L. Billinger
The NIST Noise Project has developed the theoretical formalism and experimental methods for performing accurate noise-temperature measurements on wafer. This report summarizes the theoretical formulation and describes the design, methods, and results of

Broadband Electromagnetic Field Sensors with Electro-Optical Links

November 1, 1999
Author(s)
Keith D. Masterson, Motohisa Kanda, David R. Novotny
In this paper, we review the system design, antenna structures, and optoelectronic components that can be used to accurately measure electromagnetic (EM) fields at frequencies up to 100 GHz, in support of the technologies of telecommunications, materials

Linear Dipole Response in a Reverberation Chamber

November 1, 1999
Author(s)
David A. Hill
A new spatial correlation function is derived for the axial electric field and is compared with the previously known spatial correlation function for the total electric field. The new correlation function is used to determine the average power received by
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