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Search Publications by: Dylan Williams (Fed)

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Displaying 126 - 150 of 583

A NIST Testbed Approach to Verifying mmWave Wireless Communication Signals

January 18, 2018
Author(s)
Catherine A. Remley, Dylan F. Williams, Robert D. Horansky
This presentation discusses NIST methods for providing traceable modulated signals at microwave and millimeter-wave frequencies in both conducted and free-field environments. It was presented at the 3rd NSF mmWave Research Coordination Network Workshop in

Hybrid Characterization of Nanolitre Dielectric Fluids in a Single Microfluidic Channel up to 110 GHz Song

December 1, 2017
Author(s)
Nathan D. Orloff, Song Liu, James C. Booth, Dylan F. Williams, Dominec Schreurs, Bart Nauwelaers, Iija Oclet, Charles A. Little
In this work, we present a new “hybrid” method for dielectric measurements of nanolitre fluid samples on-wafer. The first part of the hybrid method is a technique which extracts the 4 complex permittivity of the microfluidic channel wall material. The

The Role of Filtering Higher Order Reflections in Antenna Extrapolation Measurements

September 30, 2017
Author(s)
Rob Horansky, Mohit S. Mujumdar, Dylan Williams, Kate Remley, David R. Novotny, Michael H. Francis
With more and more wireless devices being made with no test ports, and with the need to test these devices in real-world scenarios with no cable interference, over-the-air (OTA) testing has been dominating the test and manufacture industry. At NIST, we are

Measurement Challenges for 5G and Beyond

July 14, 2017
Author(s)
Catherine A. Remley, Jeffrey A. Jargon, Joshua A. Gordon, Alexandra E. Curtin, David R. Novotny, Christopher L. Holloway, Robert D. Horansky, Michael S. Allman, Jeanne T. Quimby, Camillo A. Gentile, Peter B. Papazian, Ruoyu Sun, Damir Senic, Jelena Senic, Matthew T. Simons, Maria G. Becker, Dylan F. Williams, Richard A. Chamberlin, Jerome G. Cheron, Ari D. Feldman, Paul D. Hale, Mohit S. Mujumdar, Nada T. Golmie
National Metrology Institutes (NMIs) around the world are charged with supporting industry through improved measurement science and by providing a traceability path to fundamental physical standards. Mobile wireless communications have become a ubiquitous

Software Tools for Uncertainty Evaluation in VNA Measurements: A Comparative Study

June 8, 2017
Author(s)
Gustavo Avolio, Dylan Williams, Michael Frey, Sarah B. Streett, Dominique Schreurs, Andrea Ferrero, Michael Dieudonne
We compared three software tools designed for scattering-parameter measurement uncertainty evaluation. These tools propagate uncertainty to calibrated S-parameters by means of a sensitivity analysis. We also validated the sensitivity analysis with Monte

Channel Sounder Measurement Verification and Uncertainty

June 2, 2017
Author(s)
Catherine A. Remley, Jeanne T. Quimby, Paul D. Hale, Dylan F. Williams, Jeffrey A. Jargon, Rodney W. Leonhardt
This presentation describes channel-sounder measurement verification procedures including options such as comparing measurements to theory, conducted tests of a known, simulated-channel artifact, direct over-the-air comparison to a vector network analyzer