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991. Robust SOLT and Alternative Calibrations for Four-Sampler Vector Network Analyzers
Topic: Electromagnetics
Published: 10/1/1999
Authors: Jeffrey A Jargon, Roger Marks, D. K. Rytting
Abstract: This paper assesses the accuracy of several proposed lumped-element calibration techniques for four-sampler vector network analyzers in the face of imperfectly defined standards. We find that these methods offer a wide range of accuracies, depending ...

992. Robust Separation of Background and Target Signals in Radar Cross Section Measurments
Topic: Electromagnetics
Published: 12/1/2005
Authors: Lorant A. Muth, C. M. Wang, Timothy Conn
Abstract: Coherent radar cross section measurements on a target moving along the system line-of-sight in free space will trace a circle centered on the origin of the complex (I,Q) plane. The presence of additional complex background signals (including stationa ...

993. SEMCconductors Resistivity Measurements Using Split-Dielectric Resonator Technique
Topic: Electromagnetics
Published: 5/1/1996
Authors: Jerzy Krupka, S. Pietruszko, Richard G. Geyer, James R. Baker-Jarvis, Kristof Derzakowski

Topic: Electromagnetics
Published: 11/30/2007
Authors: James Paul Randa, Ken Wong, Roger Pollard
Abstract: Results are presented for simulations of a verification process for noise-parameter measurements. The verification process consists of first measuring separately both a passive device and the amplifier or transistor of interest (the DUT) and then mea ...

Topic: Electromagnetics
Published: 9/7/2007
Authors: James Paul Randa, Eyal Gerecht, David K Walker, Amanda Cox, Dazhen Gu, Lixing You, Robert L Billinger
Abstract: The Noise Project in the Electromagnetics Division of the National Institute of Standards and Technology (NIST) has proposed the development of standards for microwave brightness temperature, for use in remote-sensing applications such as satellite-b ...

996. Sampling Oscilloscope Models and Calibrations
Topic: Electromagnetics
Published: 6/17/2003
Authors: Catherine A Remley, Dylan F Williams
Abstract: We discuss the basic principles of operation of electrical sampling oscilloscopes and describe circuit models developed to design, characterize, and help explain their operation. We survey common oscilloscope calibration schemes that correct for fini ...

997. Scaling behavior of YBa 2 Cu 3 O 7 delta thin-film weak links
Topic: Electromagnetics
Published: 7/6/1990
Authors: Stephen E Russek, D. K. Lathrop, D. H. Shin, Brian H. Moeckly, R A. Buhrman, J. Silcox
Abstract: The superconductive weak link properties of microbridges formed in c-axis normal YBa 2 Cu 3 O 7 δ polycrystalline thin films containing a variable amount of large angle tilt boundaries have been studied. In the low critical current density limit ...

998. Scanning Height for ANSI C63.5 Calibrations
Topic: Electromagnetics
Published: 8/1/1998
Authors: Kenneth H. Cavcey, Dennis G Camell
Abstract: The configuration of antennas at an Open Area Test site (OATS) for calibrations results in constructive and destructive electric fields. Regardless of the calibration method used, the antenna to be calibrated should be loacted where the field varies ...

999. Scattering-Parameter Models and Representations for Microwave Mixers
Topic: Electromagnetics
Published: 1/1/2005
Authors: Dylan F Williams, Fabien Ndagijimana, Catherine A Remley, Joel Dunsmore, Sean Hubert
Abstract: We present straight-forward models and representations for RF and image mixers, and develop simple rules for transforming electrical problems involving mixers and signals at several frequencies into equivalent single-frequency problems. We show how t ...

1000. Screen-Room Measurements on the NIST Spherical-Dipole Standard Radiator
Series: Journal of Research (NIST JRES)
Topic: Electromagnetics
Published: 12/1/1994
Authors: Galen H Koepke, James Paul Randa

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