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Displaying 1 - 25 of 128

Embedding a Rydberg Atom-Based Sensor into an Antenna for Phase and Amplitude Detection of Radio Frequency Fields and Modulated Signals

October 22, 2019
Author(s)
Christopher L. Holloway, Matthew T. Simons, Abdulaziz H. Haddab, Joshua A. Gordon, David R. Novotny
We demonstrate a Rydberg atom-based sensor embedded in a parallel-plate waveguide (PPWG) for amplitude and phase detection of a radio-frequency (RF) electric field. This embedded atomic sensor is also capable of receiving modulated communications signals

Detecting and Receiving Phase-Modulated Signals With a Rydberg Atom-Based Receiver

September 2, 2019
Author(s)
Christopher L. Holloway, Matthew T. Simons, Joshua A. Gordon, David R. Novotny
Recently, we introduced a Rydberg-atom based mixer capable of detecting and measuring of the phase of a radio-frequency field through the electromagnetically induced transparency (EIT) and Autler-Townes (AT) effect. The ability to measure phase with this

A Possible Advantage of Using Bi-directional S-Parameters in Antenna Measurements

November 30, 2018
Author(s)
Alex Yuffa, Ronald C. Wittmann, Michael H. Francis, Josh Gordon, David R. Novotny
the unknown-thru calibration technique is being used to achieve a system level calibration at milli-meter frequencies (>50 GHz) on the robotic ranges at NIST. Since this requires the use of a full bi-directional measurement, which takes longer than

Precision Optical Antenna Alignment System for Tracking Antennas in 6-DOF

November 4, 2018
Author(s)
Joshua A. Gordon, David R. Novotny, Michael S. Allman
We present on an all-optical spatial metrology system, the PiCMM, that aids in the alignment and tracking of antennas with accuracies on the order of 25 microns and 0.01 deg. This system speeds up millimeter-wave antenna alignment, does not require contact

Using Radiation Pressure to Develop a Radio-Frequency Power Measurement Technique Traceable to the Redefined SI

October 15, 2018
Author(s)
Christopher L. Holloway, Matthew T. Simons, David R. Novotny, John H. Lehman, Paul A. Williams, Gordon A. Shaw
We discuss a power measurement technique traceable to the International System of Units based on radiation pressure (or radiation force) carried by an electromagnetic wave. A measurement of radiation pressure offers the possibility for a power measurement

Fading due to static and dynamic features in a factory environment on wireless channels

April 20, 2018
Author(s)
Alexandra Curtin, David R. Novotny, Richard Candell, Galen H. Koepke, Peter B. Papazian, Jeanne T. Quimby, Catherine A. Remley
Channel sounding of dense or complex environments such as industrial or factory spaces is an important piece to the puzzle of increasing the deployment of current and next-generation wireless technologies. The deployment of machine--to-machine or vehicle

The New Large Antenna Positioning System for Over-The-Air Testing at the National Institute of Standards and Technology

April 8, 2018
Author(s)
Jeffrey R. Guerrieri, David R. Novotny, Josh Gordon, Alexandra Curtin, Michael S. Allman, Kim Hassett, Quang Ton
This paper introduces the new Large Antenna Positioning System (LAPS) at the National Institute of Standards and Technology (NIST). For the last eight years NIST has been pioneering the use of robotics for antenna measurements. Starting with the

The Multi-Robot Large Antenna Positioning System for Over-The-Air Testing at the National Institute of Standards and Technology1

December 31, 2017
Author(s)
David R. Novotny, Josh Gordon, Michael S. Allman, Jeffrey R. Guerrieri, Alexandra Curtin, Kim Hassett, George McAdams, Quang Ton
To address dynamic testing requirements of new communications systems and RF processes that use non-static beam forming, NIST proposed the Large Antenna Positioning System (LAPS). The LAPS consists of two kinematically-linked six axis robotic arms, one of

Three Antenna Ranges Based on Articualted Robotic Arms at the National Institute of Standards and TechnologyDescribing Usability for Over-the-Air and Standard Near-Field Measuremnts

December 3, 2017
Author(s)
David R. Novotny, Josh Gordon, Michael S. Allman, Jeffrey R. Guerrieri, Alexandra Curtin
NIST has developed an antenna range that uses coordinated industrial robotic systems for measuring milli-meter wave (mmWave) antenna patterns and gain. The Configurable Robotic milli-meter Antenna (CROMMA) facility employs a multi-axis articulated serial

NIST Channel Sounder Overview and Channel Measurements in Manufacturing Facilities

November 8, 2017
Author(s)
Jeanne T. Quimby, Richard Candell, Catherine A. Remley, David R. Novotny, Joseph Diener, Peter B. Papazian, Alexandra Curtin, Galen H. Koepke
Manufacturers are increasingly choosing wireless platforms to replace wired ones due to their ease of installation, upgrade, and reconfigurability. Reliable and secure real-time performance of wireless platforms is technically challenging because wireless

HIGH EFFICIENCY CARBON NANOTUBE THREAD ANTENNAS

November 3, 2017
Author(s)
Christopher L. Holloway, Aydin Babajgabni, Chris Long, David R. Novotny, Nate Orloff, E. A. Bengio, Damir Senic, Lauren W. Taylor, Dimitri E. Tsentalovich
Although previous research has explored the underlying theory of high-frequency behavior of carbon nanotubes (CNTs) and CNT bundles for antennas, there is a gap in the literature for direct experimental measurements of radiation efficiency. These

Serial Robotic Arm Joint Characterization Measurements for Antenna Metrology

October 15, 2017
Author(s)
Michael S. Allman, David R. Novotny, Joshua A. Gordon, Alexandra Curtin, Scott Sandwith
We developed an accurate kinematic model of our six-axis serial robotic arm used for antenna characterization measurements. The model was calibrated over a 0.4 m3 working cell. We validated the calibration using a 1 m2 plane embedded within the calibration

Channel De-embedding and Measurement System Characterization for MIMO at 75 GHz

October 14, 2017
Author(s)
Alexandra Curtin, David R. Novotny, Alex Yuffa
Abstract—We explore the development of a sparse set of measurements for array calibration, relying on coherent multi- channel data acquisition of wideband signals at 75 GHz, and the hardware characterization and post-processing necessary to perform channel

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

Submillimeter Wavelength Scattering from Random Rough Surfaces

August 9, 2017
Author(s)
Erich N. Grossman, Richard A. Chamberlin, David R. Novotny, Joshua A. Gordon, Nina P. Basta
We describe bistatic scattering measurements on eight reference targets constructed from Al 2O 3 grit of various sizes embedded in an absorptive epoxy matrix. These samples' surface topographies were measured using focus-variation microscopy, and their

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

An All-Metal, 3-D-Printed CubeSat Feed Horn: An assessment of performance conducted at 118.7503 GHz using a robotic antenna range

February 20, 2017
Author(s)
Josh Gordon, David R. Novotny, Ronald C. Wittmann, Michael Francis, Jeffrey R. Guerrieri, Alexandra Curtin, Miranda L. Butler, Albin Gasiewski, Lavanya Periasamy
Three-dimensional (3-D) printing is finding applications across many areas and may be a useful technology for antenna fabrication for cube satellites (CubeSats). However, the quality of an antenna produced using 3-D printing must be considered if this

Assessment of a 3D-Printed Aluminum Corrugated Feed Horn at 118.7503 GHz

February 19, 2017
Author(s)
Josh Gordon, David R. Novotny, Ronald C. Wittmann, Michael H. Francis, Jeffrey R. Guerrieri, Periasamy Lavanya, Albin Gasiewski
All-metal 3D printing is investigated as a viable option for millimeter wave applications. 3D printing is finding applications across many areas and may be a useful technology for antenna fabrication. The ability to rapidly fabricate custom antenna

Industrial Wireless Systems: Radio Propagation Measurements

January 30, 2017
Author(s)
Richard Candell, Catherine A. Remley, Jeanne T. Quimby, David R. Novotny, Alexandra Curtin, Peter B. Papazian, Galen H. Koepke, Joseph Diener, Mohamed T. Hany
Radio frequency (RF) propagation measurements were conducted at three facilities representing a cross-section of different classes of industrial environments. Selected sites included a multi-acre transmission assembly factory typical of the automotive

A Tetherless, Absolute-Time Channel Sounder, Processing, and Results for a Complex Environment

November 4, 2016
Author(s)
David R. Novotny, Alexandra E. Curtin, Catherine A. Remley, Peter B. Papazian, Jeanne T. Quimby, Richard Candell
we present a channel sounder that can operate without a tether and still maintain an absolute time reference between the source and receiver. Based on a sliding correlator, with synchronized rubidium clocks to generate phase references for the up- and down

Gain Comparison of a 3D?Printed Horn and an Electroformed Horn

October 29, 2016
Author(s)
Michael H. Francis, David R. Novotny, Josh Gordon, Alexandra Curtin, Ronald C. Wittmann
The National Institute of Standards and Technology (NIST) has used the three‐antenna extrapolation method to determine the on‐axis gain of several antennas in the WR8 frequency band. One antenna is an electroformed μ=±1 probe with gain of about 9 dB. The
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