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You searched on: Topic Area: Electromagnetics

Displaying records 51 to 60 of 91 records.
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51. Comparison of Electrical Techniques for Magnetization Dynamics Measurements in Micro/Nanoscale Structures
Topic: Electromagnetics
Published: 3/25/2011
Authors: SangHyun S. Lim, Thomas M Wallis, Atif A. Imtiaz, Dazhen Gu, Pavel Kabos, Pavol Krivosik
Abstract: We compared three electrical detection techniques; differential resistance (dV/dI), RF/microwave transmission, and spin rectification measurements for magnetization dynamics in individual patterned sub-micron structures. Different electrical techniqu ...

52. Confidence in VNA Measurements ‹ The ARFTG Measurement Comparison Program
Topic: Electromagnetics
Published: 3/14/2011
Author: Ronald A Ginley
Abstract: This paper describes the ARFTG scattering parameter Measurement Comparison Program (MCP) which is supported by NIST. The ARFTG MCP is designed specifically to allow users of vector network analyzers to compare their measurements to those of their pee ...

53. 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 ...

54. Impact of RF Interference between a Passive RFID System and a Frequency Hopping Communications System in the 900 MHz ISM Band
Topic: Electromagnetics
Published: 7/25/2010
Author: Michael R Souryal
Abstract: We present experimental measurements and analysis of RF interference between a passive RFID system and a generic frequency hopping communications system in the 902 928 MHz ISM radio band. Interference in both directions is considered, RFID to communi ...

55. Active Millimeter-Wave Imaging: Standoff Detection of Concealed Weapons
Topic: Electromagnetics
Published: 7/13/2010
Authors: Randy Direen, David R Novotny, Katherine MacReynolds
Abstract: A near-field planar scanner is used to construct images of a nearby scene illuminated with millimeter-wave frequencies. We present our initial work in active millimeter-wave imaging, and how it applies to the detection of concealed weapons.

56. Characterization of Tissue-Equivalent Materials for High-Frequency Applications (200 MHz to 20 GHz)
Series: Technical Note (NIST TN)
Report Number: 1554
Topic: Electromagnetics
Published: 7/1/2010
Authors: James R. Baker-Jarvis, Sung Kim, Luke Leschallinger, Justin Johnson, Brad Givot
Abstract: The purpose of this report is to summarize the characterization of a number of high-frequency solid, liquid, and semisolid tissue-equivalent materials, from 200 MHz to 20 GHz. Carbon black and liquid mixtures were studied, but were found to be uns ...

57. Two modes behavior of vortex oscillations in spin-transfer nanocontacts subject to in-plane magnetic fields
Topic: Electromagnetics
Published: 6/25/2010
Authors: Michaela Kuepferling, Claudio Serpico, Matthew R Pufall, William H Rippard, Thomas M Wallis, Atif A. Imtiaz, Pavel Kabos
Abstract: The field dependence of vortex oscillations in a spin-transfer metallic nanocontact, subject to in-plane, spatially uniform, external fields, is studied by measuring the power spectral density of the voltage across the device. The measured spectra ...

58. High-Frequency Dielectric Measurements: A Tutorial
Topic: Electromagnetics
Published: 4/1/2010
Authors: James R. Baker-Jarvis, Michael D Janezic, Donald C. DeGroot
Abstract: KNOWLEDGE of the response of materials to electromagnetic (EM) fields in the frequency range of radio frequency (RF) through terahertz (THz) is critical to numerous research projects and electronic product development activities. Electromagnetic wave ...

59. Transport in Electromagnetic Metrology Based on Nonequilibrium Statistical Mechanics
Topic: Electromagnetics
Published: 11/3/2009
Authors: James R. Baker-Jarvis, Jack T Surek
Abstract: Current research is probing transport on ever smaller scales. Modeling of the electromagnetic interaction with nanoparticles or small collections of dipoles and its associated the energy transport and nonequilibrium characteristics requires a deta ...

60. Unified Model for Bulk Acoustic Wave Resonators‰ Nonlinear Effects
Topic: Electromagnetics
Published: 9/20/2009
Authors: Eduard Rocas, Juan C. Collado Gomez, James C Booth, Enrique Iborra, Robert Aigner
Abstract: We present a nonlinear model for Bulk Acoustic Wave resonators that combines different sources of nonlinearity, using device-independent material specific parameters, to predict the intermodulation and harmonics generation. The actual model accounts ...

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