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Displaying records 21 to 30 of 54 records.
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21. 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 ...

22. 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 ...

23. International Comparison of Noise-Temperature Measurements at 2, 4, and 12 GHz
Topic: Electromagnetics
Published: 7/1/1998
Authors: James Paul Randa, J. Achkar, F. I Buchholz, T. Colard, D. Schubert, M. Sinclair, John Rice, G. S. Williams
Abstract: We report results of a recent international comparison of thermal noise-power measurements, performed under the auspices of CIPM/CCE. The noise temperatures of two solid-state sources with GPC-7 connectors were measured at 2, 4, and 12 GHz. All ...

24. International Comparison of Thermal Noise-Temperature Measurements at 2, 4 and 12 GHz
Topic: Electromagnetics
Published: 4/1/1999
Authors: James Paul Randa, J. Achkar, F. IM Bucholz, T. Colard, John Rice, D. Schubert, M. Sinclair, G. S. Williams

25. International Comparison, Final Summary Report
Topic: Electromagnetics
Published: 11/1/2000
Author: James Paul Randa
Abstract: An international comparison of noise temperature of coaxial (GPC-7) sources at 2 GHz, 4 GHz and 12 GHz has been completed. Participating laboratories included the Physikalisch-Technische Bundesanstalt (PTB); the Bureau National de Metrologie-Laborato ...

26. MIMO Capacity in 2-D and 3-D Isotropic Environments
Topic: Electromagnetics
Published: 5/21/2013
Authors: Ryan J. Pirkl, Catherine A Remley
Abstract: We analyze the distribution of MIMO channel capacity for different antennas in 2-D and 3-D statistically isotropic environments. These represent possible test environments that may be generated by multi-probe anechoic and reverberation chambers, ...

27. Measurement of orbital asymmetry and strain in Co^d90^Fe^d10^/Ni multilayers and alloys: Origins of perpendicular anisotropy
Topic: Electromagnetics
Published: 2/13/2013
Authors: Justin M Shaw, Hans Toya Nembach, Thomas J Silva
Abstract: We use broadband ferromagnetic resonance spectroscopy and x-ray diffraction to investigate the fundamental origin of perpendicular anisotropy in Co^d90^Fe^d10^/Ni multilayers. By careful evaluation of the spectroscopic {I}g{/I}-factor, we determine ...

28. 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 ...

29. Monte Carlo Simulation of Noise Parameter Uncertainties
Topic: Electromagnetics
Published: 11/1/2002
Authors: James Paul Randa, Wojciech Wiatr
Abstract: We present results for uncertainties in noise-parameter measurements, obtained using a Monte Carlo simulation of the measurements. Sets of data were generated to simulate measurements on a low-noise amplifier, with given uncertainties in the underlyi ...

30. Multiport Noise Characterization and Differential Amplifiers
Topic: Electromagnetics
Published: 6/1/2000
Author: James Paul Randa
Abstract: I address the issue of the definition and measurement of noise figure and parameters to characterize multiport devices, particularly differential amplifiers. A parameterization in terms of the noise matrix appears to be the most practical. The nois ...

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