Dylan F. Williams
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View article: Two-Tier Vector-Network-Analyzer Calibrations for Uncertainties in Laboratory-Based Over-the-Air and Channel Measurements
Two-Tier Vector-Network-Analyzer Calibrations for Uncertainties in Laboratory-Based Over-the-Air and Channel Measurements Open
We present a straightforward and systematic approach for identifying the dominant uncertainties related to vector network analyzer measurements of chambers utilized for free-field test of wireless devices. We assess the uncertainty related…
View article: A Distributed Theory for Contactless Interconnects at Terahertz Frequencies
A Distributed Theory for Contactless Interconnects at Terahertz Frequencies Open
We test a multimodal analytical model for distributed contactless interconnects by comparing it to 3-D full-wave simulations. In comparison to 3-D simulations, the model offers insight into how the interconnect works and reduces the comput…
View article: Physical models and dimensional traceability of 2.4 mm coaxial airline standards for determining systematic uncertainties of calibrated scattering-parameters
Physical models and dimensional traceability of 2.4 mm coaxial airline standards for determining systematic uncertainties of calibrated scattering-parameters Open
In this report, we document the models and dimensional traceability of our 2.4 mm coaxial airline standards for performing multiline thru-reflect-line calibrations up to 50 GHz using vector network analyzers. We identify the equations used…
View article: An Analysis of Research Methods in Leading Sport Marketing Journals: A Call for Historical Research
An Analysis of Research Methods in Leading Sport Marketing Journals: A Call for Historical Research Open
General marketing scholars have advocated for historical research since the 1980s, leading to a substantial increase in history-based marketing articles. With general marketing embracing historical research, the present content analysis as…
View article: On-Wafer Vector-Network-Analyzer Measurements at mK Temperatures
On-Wafer Vector-Network-Analyzer Measurements at mK Temperatures Open
We describe a system for performing on-wafer vector-network-analyzer measurements from 100 MHz to 15 GHz at mK temperatures (i.e., less than 20 mK). We first demonstrate a camera-less probe positioning system and calibrate this system at 4…
View article: Practical Correlation-Matrix Approaches for Standardized Testing of Wireless Devices in Reverberation Chambers
Practical Correlation-Matrix Approaches for Standardized Testing of Wireless Devices in Reverberation Chambers Open
We extend the autocorrelation-based approaches currently used in standards to full correlation-matrix-based approaches in order to identify correlation between both spatially adjacent and non-adjacent samples in reverberation-chamber measu…
View article: Wideband Synthetic-Aperture Millimeter-Wave Spatial-Channel Reference System With Traceable Uncertainty Framework
Wideband Synthetic-Aperture Millimeter-Wave Spatial-Channel Reference System With Traceable Uncertainty Framework Open
This paper describes a wideband synthetic-aperture system and the associated Fourier processing for generating high-resolution spatial and temporal estimates of the signal propagation environment in wireless communication channels at milli…
View article: Editorial
Editorial Open
This Special Issue of IEEE Microwave and Wireless Components Letters (MWCL) represents the second year that we include selected papers from the IEEE Microwave Theory and Techniques Society (MTT-S) International Microwave Symposium (IMS). T…
View article: The IMS2022 Technical Program Takes a Systems View
The IMS2022 Technical Program Takes a Systems View Open
Presents information on the IMS 2022 Conference, events, and meetings.
View article: Home Fare Advantage: An examination of the Role of Food and Beverages in Mercedes-Benz Stadium’s Event Experience
Home Fare Advantage: An examination of the Role of Food and Beverages in Mercedes-Benz Stadium’s Event Experience Open
Through the lens of Expectation Disconfirmation Theory and with consideration of other event experience factors, our study examines how strategic concessions changes implemented by the Arthur M. Blank (AMB) Group with the building of Merce…
View article: Methodology for Measuring the Frequency Dependence of Multipath Channels Across the Millimeter-Wave Spectrum
Methodology for Measuring the Frequency Dependence of Multipath Channels Across the Millimeter-Wave Spectrum Open
Millimeter-wave (mmWave) communications promise Gigabit/s data rates thanks to the availability of large swaths of bandwidth between 10–100 GHz. Although cellular operators prefer the lower portions of the spectrum due to popular belief th…
View article: IMS2022 CFP
IMS2022 CFP Open
Elsie Vega
View article: IMS2022 CFP
IMS2022 CFP Open
Elsie Vega
View article: IMS2022 CFP
IMS2022 CFP Open
Elsie Vega
View article: IMS 2022
IMS 2022 Open
Elsie Vega
View article: IMS 2022
IMS 2022 Open
Elsie Vega
View article: Millimeter-Wave Channel-Sounder Performance Verification Using Vector Network Analyzer in a Controlled RF Channel
Millimeter-Wave Channel-Sounder Performance Verification Using Vector Network Analyzer in a Controlled RF Channel Open
A new comparison-to-reference performance verification technique compares an E-band channel-sounder and reference vector network analyzer measurements of the same controlled, static channel. This new technique reduces the number of inaccur…
View article: The Effect of Noise on Reverberation-Chamber Measurements of Antenna Efficiency
The Effect of Noise on Reverberation-Chamber Measurements of Antenna Efficiency Open
In this work, we show that high antenna frequency selectivity can make it more challenging to accurately measure antenna efficiency in a reverberation chamber (RC) when using the two-antenna method since electronic noise can affect the mea…
View article: IMS2022
IMS2022 Open
Elsie Vega
View article: Accurate Gain Measurement Technique for Limited Antenna Separations
Accurate Gain Measurement Technique for Limited Antenna Separations Open
The Friis equation is often used to determine the gain of antennas but assumes that far-field conditions are met. For limited antenna separations on the order of the Fraunhofer distance, its use requires a precise estimate of the amplitude…
View article: Physical Models and Dimensional Traceability of WR15 Rectangular Waveguide Standards for Determining Systematic Uncertainties of Calibrated Scattering-Parameters
Physical Models and Dimensional Traceability of WR15 Rectangular Waveguide Standards for Determining Systematic Uncertainties of Calibrated Scattering-Parameters Open
In this report, we document the models and dimensional traceability of our WR15 rectangular waveguide standards for performing multiline thru-reflect-line calibrations from 50 GHz to 75 GHz using vector network analyzers.We identify the eq…
View article: Consistency in Monte Carlo Uncertainty Analyses
Consistency in Monte Carlo Uncertainty Analyses Open
The Monte Carlo method is an established tool that is often used to evaluate the uncertainty of measurements. For computationally challenging problems, Monte Carlo uncertainty analyses are typically distributed across multiple processes on…
View article: Evaluating Uncertainty of Nonlinear Microwave Calibration Models With Regression Residuals
Evaluating Uncertainty of Nonlinear Microwave Calibration Models With Regression Residuals Open
We investigate the performance of a recently developed algorithm that evaluates the uncertainty of nonlinear multivariate microwave calibration models using regression residuals. We apply the algorithm to synthetic data consisting of both …
View article: Uncertainty in Large-Signal Measurements Under Variable Load Conditions
Uncertainty in Large-Signal Measurements Under Variable Load Conditions Open
We investigate the uncertainty of large-signal measurements of a microwave transistor due to variation in the load conditions at the fundamental frequency. In particular, we evaluate uncertainties in the complex frequency-domain traveling …
View article: Precision Millimeter-Wave-Modulated Wideband Source at 92.4 GHz as a Step Toward an Over-the-Air Reference
Precision Millimeter-Wave-Modulated Wideband Source at 92.4 GHz as a Step Toward an Over-the-Air Reference Open
As the next-generation communications technology continues to evolve to utilize millimeter-wave frequencies, calibration methods are needed for the nonidealities related to these frequencies in communications electronics. In this article, …
View article: Evaluating Uncertainty of Microwave Calibration Models With Regression Residuals
Evaluating Uncertainty of Microwave Calibration Models With Regression Residuals Open
We present a sensitivity-analysis and a Monte-Carlo algorithm for evaluating the uncertainty of multivariate microwave calibration models with regression residuals. We then use synthetic data to verify the performance of the algorithms and…
View article: Monte Carlo sampling bias in the microwave uncertainty framework
Monte Carlo sampling bias in the microwave uncertainty framework Open
Uncertainty propagation software can have unknown, inadvertent biases\nintroduced by various means. This work is a case study in bias identification\nand reduction in one such software package, the Microwave Uncertainty Framework\n(MUF). T…