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Search Publications by: Dylan Williams (Fed)

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Displaying 76 - 100 of 583

DARPA Organic Interconnect Characterization

January 27, 2020
Author(s)
Dylan Williams, Richard Chamberlin, Jerome Cheron, Sam Chitwood, Ken Willis, Brad Butler, Farhang Yazdani
We report on a study of interconnects fabricated on organic and silicon interposers used to connect state-of-the art digital, analog and RF chiplets commissioned by the U.S. Defense Advanced Research Projects Agency (DARPA). The interconnects were

Verifying the Performance of a Correlation-Based Channel Sounder in the 3.5 GHz Band with a Calibrated Vector Network Analyzer

December 12, 2019
Author(s)
Jeffrey A. Jargon, Jeanne T. Quimby, Catherine A. Remley, Amanda A. Koepke, Dylan F. Williams
We verified the performance of a correlation-based channel sounder in the 3.5 GHz band with a calibrated vector network analyzer by comparing measurements in a stable, coaxial environment at the same reference planes. The purpose of this experiment was to

Monte Carlo Sampling Bias in the Microwave Uncertainty Framework

June 27, 2019
Author(s)
Michael R. Frey, Benjamin Jamroz, Amanda Koepke, Jake Rezac, Dylan Williams
The Microwave Uncertainty Framework (MUF) is a software suite created, supported, and made publicly available by the Radio Frequency Division of the U.S. National Institute of Standards and Technology. The general purpose of the MUF is to provide automated

Large-Signal Network Analysis for Over-the-Air Test of Up-Converting and Down-Converting Phased Arrays

June 1, 2019
Author(s)
Alec Weiss, Dylan Williams, Jeanne Quimby, Rod Leonhardt, Thomas Choi, Zihang Chen, Kate Remley, andreas Molisch, Ben Jamroz, Jake Rezac, Peter Vouras
We explore large-signal network analysis for the over-the-air test of up-converting and down-converting phased arrays. The approach first uses a vector network analyzer to calibrate the impulse response of an over-the-air test system at RF. The vector

Large-Signal-Network-Analyzer Phase Calibration on an Arbitrary Grid

April 30, 2019
Author(s)
Aric Sanders, Dylan Williams, Joshua Kast, Kate Remley, Rob Horansky
We have developed a method for improving the synchronization of large-signal network analyzers and transferring "cross-frequency" phase calibrations from a calibrated sampling oscilloscope to the large-signal vector network analyzer on an arbitrary

Portable Verification Artifact for Millimeter-Wave-Frequency Channel Sounders

March 1, 2019
Author(s)
Jos N. Dortmans, Jeanne Quimby, Kate Remley, Dylan Williams, Jelena Senic, Roy Sun, Peter B. Papazian
We develop a portable artifact for the conducted verification of millimeter-wave-frequency channel sounders. The artifact is first characterized with a vector network analyzer, providing a high-dynamic range, traceable measurement and complete uncertainty

Propagating Measurement Uncertainty to Microwave Amplifier Nonlinear Behavioral Models

February 1, 2019
Author(s)
Dylan F. Williams, Laurence T. Stant, Martin J. Salter, Nick M. Ridler, Peter Aaen
We propagate for the first time correlated measurement uncertainties into a nonlinear behavioral model of a millimetre-wave amplifier. We make use of the NIST Microwave Uncertainty Framework to evaluate the uncertainties in large-signal electromagnetic

EMC and Metrology Challenges for 5G and Beyond

December 7, 2018
Author(s)
Perry F. Wilson, Catherine A. Remley, William F. Young, Camillo A. Gentile, John M. Ladbury, Dylan F. Williams
The potential to connect people and devices anywhere and anytime is driving the development and deployment of a multitude of wireless systems. Wireless connectivity is central to advanced communication technologies, the internet of things (IoT), the smart