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NIST Authors in Bold

Displaying 1 - 25 of 1539

Radio Spectrum Occupancy Measurements Amid COVID-19 Telework and Telehealth

October 14, 2022
Author(s)
Dan Kuester, Xifeng Lu, Dazhen Gu, Azizollah Kord, Jake Rezac, Katie Carson, Marla L. Dowell, Elizabeth Eyeson, Ari Feldman, Keith Forsyth, Vu Le, John Marts, Mike McNulty, Kyle Neubarth, Andre Rosete, Matthew Ryan, Maija Teraslina
During the COVID-19 pandemic, NIST began a targeted campaign of measurements of averaged power and occupancy rate in the radio spectrum. The purpose was to sample real environments to offer timely insights into data infrastructure where it might be

Looking Forward to IMS 2022 (Guest Editorial)

May 1, 2022
Author(s)
Thomas Mitchell (Mitch) Wallis
As guest editor, it's my pleasure to welcome you to this issue of IEEE Microwave Magazine. This issue focuses on the 2022 International Microwave Symposium (IMS), which will be held in Denver in June. As I sit down to write this column, it is a wintry

IMS2022 Panel Sessions

April 8, 2022
Author(s)
Jeffrey Jargon, Jasmin Grosinger, Mona Hella
The panel sessions at this year's IEEE International Microwave Symposium (IMS) Week have been put together to cover the broad range of topics and events spanning the week. These sessions are scheduled during lunch breaks.

Measurements of IP3 and P1dB for Spectrum Monitoring with Software Defined Radios

March 30, 2022
Author(s)
Mike McNulty, Dazhen Gu, Dan Kuester, Payam Nayeri
This paper discusses methodology for characterizing linearity summary parameters of software-defined radio receivers. First, we introduce a highly automated testbed for 1-dB compression point (P1dB) and third-order input intercept point (IIP3). With this

Markov Multi-Beamtracking in SU-MIMO with 60 GHz Mobile Channel Measurements

December 28, 2021
Author(s)
Steve Blandino, Jelena Senic, Camillo Gentile, Derek Caudill
Beamforming training refers to the exhaustive scan over which the receiver and transmitter beams are steered along a predefined set of angles to determine the beam pairs that coincide with the dominant channel paths, for spatial multiplexing. In the

A Robust Algorithm for PAM4 Eye-Diagram Analysis

December 20, 2021
Author(s)
Jeffrey Jargon, Jerome Cheron
We propose a new approach for analyzing PAM4 (pulse amplitude modulation 4-level) eye diagrams that always provides a unique solution by making use of a K-Means algorithm in conjunction with a robust, shortest interval location estimator. Our motivation

Updates to the traceability of mm-wave power measurements at NIST

December 17, 2021
Author(s)
Aaron Hagerstrom, Angela Stelson, Jeffrey Jargon, Chris Long
Metrological traceability helps ensure the reliability of measurements by allowing them to be compared with established international standards with well-understood uncertainties. A thorough uncertainty analysis is therefore necessary to provide traceable

Dielectric-Loaded Microwave Rectangular Waveguide and Higher Order Modes Resonator

June 2, 2021
Author(s)
Christopher L. Holloway, Abdulaziz H. Haddab, Edward Kuester
Resonant transmission through a dielectric-loaded slot in a thick conducting diaphragm embedded in a rectangular waveguide is modeled using an analytical approximation based on the slot being small compared to a free space wavelength. Image theory relates

Measurement Challenges for Spectrum Sensing in Communication Networks

April 27, 2021
Author(s)
Dan Kuester, Yao Ma, Dazhen Gu, Adam Wunderlich, Jason Coder, Joseph R. Mruk
We summarize a few key spectrum sensing measurement challenges and recent advances. Laboratory tests of sensing are complicated by their inseparable and often imbedded role in modern hardware. Results are difficult to calibrate because physical parameters

Quasi-Deterministic Channel Propagation Model for an Urban Environment at 28 GHz

April 16, 2021
Author(s)
Neeraj Varshney, Jian Wang, Chiehping Lai, Camillo Gentile
We reduced parameters of the Quasi-Deterministic channel propagation model, recently adopted by the IEEE 802.11ay task group for next-generation Wi-Fi at millimeter-wave, from measurements collected in an urban environment with our 28 GHz directional

Josephson Microwave Sources Applied to Quantum Information Systems

December 18, 2020
Author(s)
Adam J. Sirois, Manuel C. Castellanos Beltran, Anna E. Fox, Samuel P. Benz, Peter F. Hopkins
Quantum computers with thousands or millions of qubits will require a scalable solution for qubit control and readout electronics. Colocating these electronics at millikelvin temperatures has been proposed and demonstrated, but there exist significant

Noise Influence on Scattering-Parameter Measurements

November 4, 2020
Author(s)
Dazhen Gu, Jeffrey A. Jargon, Matthew J. Ryan, Anouk Hubrechsen
We present a general model of noise-influenced scattering (S) parameter measurements performed by a vector network analyzer (VNA). The residual error of the S-parameter due to the noise appears like a complex Gaussian quotient. The statistical analysis of

Note: A Radio Frequency Voltage-Controlled Current Source for Quantum Spin Manipulation

October 19, 2020
Author(s)
Daniel S. Barker, Alessandro Restelli, James A. Fedchak, Julia K. Scherschligt, Stephen P. Eckel
We present a design for a wide-bandwidth, voltage-controlled current source that is easily integrated with radiofrequency magnetic field coils. Our design uses current feedback to compensate for the frequency-dependent impedance of a radiofrequency antenna

Blind Calibration of Phase Drift in Millimeter-Wave Channel Sounders

June 11, 2020
Author(s)
Jack Chuang, Jelena Senic, Chunmei Liu, Camillo Gentile, Sung Yun Jun, Derek Caudill
Millimeter-wave channel sounders are much more sensitive to phase drift than their microwave counterparts by virtue of shorter wavelength. This matters when coherently phasing (electronic or mechanical) antenna scans collected over seconds, minutes, or

Blind Measurement of Receiver System Noise

June 5, 2020
Author(s)
Daniel G. Kuester, Adam J. Wunderlich, Duncan A. McGillivray, Dazhen Gu, Audrey Puls
Tightly packaged receive systems pose a challenge for noise measurements. The only available receiver outputs are often user data: link benchmark or diagnostic information that can be scavenged with software. These could include data rate benchmark, self

A Multi-Band Rydberg-Atom Based Receiver/Antenna: AM/FM Stereo Reception

April 2, 2020
Author(s)
Christopher L. Holloway, Matthew T. Simons, Joshua A. Gordon
With the re-definition of the International System of Units (SI) that occurred in October of 2018, there has recently been a great deal of attention in the development atom-base sensors for metrology applications. In particular great progress had been made
Displaying 1 - 25 of 1539