U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Josh Gordon (Fed)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 126 - 150 of 177

Broadband Rydberg Atom Based Self-Calibrating RF E-field Probe

August 16, 2014
Author(s)
Christopher L. Holloway, Joshua A. Gordon, Steven R. Jefferts, Thomas P. Heavner
We present a significantly new approach for an electric (E) field probe. The probe is based on the interaction of RF-fields with Rydberg atoms, where alkali atoms are excited optically to Rydberg states and the applied RF-field alters the resonant state of

Millimeter Wave Detection via Autler-Townes Splitting in Rubidium Rydberg Atoms

July 17, 2014
Author(s)
Joshua A. Gordon, Christopher L. Holloway, Andrew Schwarzkopf, Dave Anderson, Stephanie Miller, Nithiwadee Thaicharoen, Georg Raithel
In this paper we demonstrate the detection of millimeter waves via Autler-Townes splitting in 85Rb Rydberg atoms. This method may provide an independent atomic-based SI-traceable method for measuring mm-wave electric fi elds, which addresses a gap in

INTERNATIONAL COMPARISON OF KU-BAND STANDARD GAIN HORN CHARACTERIZATION

April 11, 2014
Author(s)
Jeffrey R. Guerrieri, David R. Novotny, Michael H. Francis, Jason B. Coder, Joshua A. Gordon
International comparison of antenna measurement results between national measurement laboratories supports interoperability of communication equipment in today’s world market. The National Institute of Standards and Technology (NIST) is the pilot National

Terahertz Active and Passive Imaging

April 11, 2014
Author(s)
Erich N. Grossman, Joshua A. Gordon, David R. Novotny, Richard A. Chamberlin
We describe the results of bistatic scattering measurements covering 325-650 GHz on a series of wellcharacterized random rough test surfaces. These have implications for active THz imagers that use coherent sources for illumination. The mean scattered

Using a Laser Tracker to Actively Coordinate the Motion of a 3m Industrial Robot to Within 50 Microns: An ongoing effort to accurately determine and correct positioning errors.

October 1, 2013
Author(s)
David R. Novotny, Joshua A. Gordon, Jason B. Coder, Jeffrey R. Guerrieri, Michael H. Francis
We are using industrial-grade robotics guided by a metrology-grade laser tracker to perform antenna calibrations at mmWave frequencies. We are using a 3 m-reach robot to spherically scan a milli-meter Wave (mmWave) probe around an antenna under test (AUT)

Polymer Membranes to Quarter-Wave Match Gaussian Optics

February 18, 2013
Author(s)
Jack T. Surek, Jason B. Coder, Joshua A. Gordon, David R. Novotny
We demonstrate that a simple quarter wave match designed for 110 GHz in WR10 waveguide reduces reflected power by a factor of ten at high density polyethylene (HDPE)-air interfaces. Polytetrafluoroethylene (PTFE)-based membranes that are expanded by