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Displaying records 661 to 670 of 747 records.
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661. Switching Characteristics of NPT- and PT-IGBTs Under Zero-Voltage Switching Conditions
Topic: Electronics & Telecommunications
Published: 10/5/1999
Authors: B M. Song, Huibin Zhu, Jih-Sheng Lai, Allen R Hefner Jr
Abstract: In this paper, switching characteristics of non-punch through (NPT) and punch through (PT) Insulated Gate Bipolar Transistors (IGBTs) are evaluated under zero-voltage switching (ZVS) conditions. Through the physics-based modeling and experiments, th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30165

662. Synchronization monitoring of I/Q data and pulse carving misalignment for a parallel-type 20-Gb/s RZ-DQPSK transmitter by measuring RF clock tone/low frequency power
Topic: Electronics & Telecommunications
Published: 12/15/2008
Authors: Jeffrey A Jargon, Xiaoxia Wu, Laurie Christian, Bo Zhang, Wei-Ren Peng, Jeng-Yuan Yang, Lin Zhang, Scott Nuccio, Loukas Paraschis, Alan Willner
Abstract: We experimentally demonstrate a technique for monitoring the time misalignment of in-phase/quadrature (I/Q) data streams and pulse carver/data in a 20-Gb/s return-to-zero differential quadrature phase-shift-keying (RZ-DQPSK) transmitter. By measuring ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33072

663. Synthesis, Structural Characterization, and Electronic Structure of Single-Crystalline CuxV2O5 Nanowires
Topic: Electronics & Telecommunications
Published: 4/6/2009
Authors: Daniel A Fischer, C Patridge, Cherno Jaye, H Zhang, Amy Marschilok, E Takeuchi, S Banerjee
Abstract: Single-crystalline copper vanadium oxide nanowires β'-CuxV2O5 (x ~ 0.60) have been synthesized by the hydrothermal reduction of bulk CuV2O6 using small-molecule aliphatic alcohols as reducing agents. The prepared copper vanadium bronze nanow ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901684

664. Synthesized Isotropic Pattern Antennas for EM FieldMeasurements
Topic: Electronics & Telecommunications
Published: 8/1/1981
Author: Gerome R. Reeve
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=31193

665. TEM Analysis of Deformation in Thin Films of Aluminum after both AC Thermomechanical and Tensile Deformation
Topic: Electronics & Telecommunications
Published: 4/1/2005
Authors: Roy Howard Geiss, Robert R Keller, David Thomas Read, Yi-Wen Cheng
Abstract: Thin films of sputtered aluminum were deformed by two distinctly different experimental techniques. One experiment comprised of passing high electrical AC current density, 12.2 MA/cm2 at 100 Hz, through 800 ¿¿m long X 3.3 ¿¿m wide and 0.5 ¿¿m thick p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50149

666. TEM Horn Antenna Design Principles
Series: Technical Note (NIST TN)
Report Number: 1544
Topic: Electronics & Telecommunications
Published: 1/23/2007
Authors: Chriss A. Grosvenor, Robert T. Johnk, David R Novotny, Nino Canales, Benjamin Davis, Jason Veneman
Abstract: The National Institute of Standards and Technology has developed several ultra-wideband, TEM Horn antennas with phase linearity, short impulse duration, and a near constant antenna factor. These are time-domain antennas used to measure impulsive fiel ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32473

667. TEM horn antennas: A promising new technology for compliance testing
Topic: Electronics & Telecommunications
Published: 8/1/2004
Authors: Chriss A. Grosvenor, Robert T. Johnk, David R Novotny, Seturnino Canales
Abstract: Abstract-This paper discusses the advantages of using a TEM-horn antenna over conventional EMC antennas such as the log-periodic, hybrids, or biconical antennas. Important issues such as frequency coverage, linearity, time-resolution of events, cost, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=31664

668. Temperature-dependent mechanical-resonance frequencies and damping in ensembles of gallium nitride nanowires
Topic: Electronics & Telecommunications
Published: 10/22/2012
Authors: Kristine A Bertness, Norman A Sanford, J. R. Montague, H.S. Park, Victor M. Bright, C. T. Rogers
Abstract: We have measured singly clamped cantilever mechanical-resonances in ensembles of as-grown gallium nitridenanowires (GaN NWs), from 12 K to 320 K. Resonance frequencies are approximately linearly dependent on temperature near 300 K ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910038

669. Terahertz imaging and spectroscopy based on hot electron bolometer (HEB) heterodyne detection
Topic: Electronics & Telecommunications
Published: 1/23/2008
Authors: Eyal Gerecht, Lixing You
Abstract: Imaging and spectroscopy at terahertz frequencies have great potential for healthcare, plasma diagnostics, and homeland security applications. Terahertz frequencies correspond to energy level transitions of important molecules in biology and astrophy ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32856

670. Terahertz radiometer design for traceable noise-temperature measurements
Topic: Electronics & Telecommunications
Published: 7/14/2006
Authors: Eyal Gerecht, Dazhen Gu, James Paul Randa, David K Walker, Robert L Billinger
Abstract: We report on design of a radiometer for traceable noise-temperature measurements at terahertz frequencies, including noise measurements on cryogenic IF components, development and test of quasi-optical adapter technology, development of black body st ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32174



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