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Search Publications by: Christopher L. Holloway (Fed)

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Displaying 26 - 50 of 211

Fiber-coupled Vapor Cell for a Portable Rydberg Atom-based RF Electric Field Sensor

August 1, 2018
Author(s)
Matthew T. Simons, Joshua A. Gordon, Christopher L. Holloway
We demonstrate a moveable Rydberg atom based radio frequency (RF) electric (E) field probe. The technique is based on electromagnetically-induced transparency (EIT) and Autler-Townes splitting. Two fibers attached to an 10mm cube Cs vapor cell are used to

Generalized Sheet Transition Conditions (GSTCs) for a Metascreen

May 1, 2018
Author(s)
Christopher L. Holloway
Using the multiple-scales homogenization method, we derive generalized sheet transition conditions (GSTCs) for electromagnetic fields at the surface of a metascreen---a metasurface with a ``fishnet'' structure. These surfaces are characterized by

Measurement of Radio-Frequency Radiation Pressure

February 13, 2018
Author(s)
Christopher L. Holloway, Alexandra B. Artusio-Glimpse, Matthew T. Simons, Ivan Ryger
In this work we perform measurements of the radiation pressure of a radio-frequency (RF) electromagnetic field which will lead to a new SI traceable power calibration. There are several groups around the world investigating methods to perform more direct

Estimating and Correcting the Device-Under-Test Transfer Function in Loaded Reverberation Chambers for Over-the-Air Tests

December 1, 2017
Author(s)
Catherine A. Remley, Ryan J. Pirkl, Chih-Ming Wang, Damir Senic, Arvand Homer, Matt V. North, Maria G. Becker, Robert D. Horansky, Christopher L. Holloway
We assess the potential error in measurements of the power transfer function corresponding to a reverberation chamber set-up when different antenna types are used for the reference and DUT measurements. We derive a mathematical description of the transfer

Rydberg Atom Electric-Field Metrology

November 28, 2017
Author(s)
Joshua A. Gordon, Christopher L. Holloway, Matthew T. Simons
We present a technique which shows great promise for realizing an atomic standard measurement of RF fields that is intrinsically calibrated, directly linked to the SI and atomic structural constants. This technique relies on the reponse of Rydberg atoms to

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

Development of A New Atom-Based SI Traceable Electric-Field Metrology Technique

October 18, 2017
Author(s)
Christopher L. Holloway, Matthew T. Simons, Joshua A. Gordon
We are developing a fundamentally new atom-based approach for Electric (E) metrology. This technique has the capability of becoming a new international standard for E-field measurements and calibrations. Since this new approach is based on atomic

Atom-based RF electric field metrology above 100 GHz

July 16, 2017
Author(s)
Christopher L. Holloway, Matthew T. Simons, Joshua A. Gordon
While atom-based radio-frequency (RF) electric field probes have the potential to improve electric field measurements for a broad range of frequencies (from a few GHz to 100s of GHz) and field strengths (mV/m to kV/m), extending the measurement

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

Electric field metrology for SI traceability: Systematic measurement uncertainties in electromagnetically induced transparency in atomic vapor

May 24, 2017
Author(s)
Christopher L. Holloway, Matthew T. Simons, Joshua A. Gordon, Georg Raithel, dave Anderson
We investigate the relationship between the Rabi frequency ($\Ω_{RF}$, related to the applied electric field) and Autler-Townes (AT) splitting, when performing atom-based radio- frequency (RF) electric (E) field strength measurements using Rydberg states