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You searched on: Topic Area: Electromagnetics

Displaying records 1 to 10 of 90 records.
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1. Millimeter-Wave Near-Field Measurements Using Coordinated Robotics
Topic: Electromagnetics
Published: 12/1/2015
Authors: Joshua A Gordon, David R Novotny, Ronald Curtis Wittmann, Michael H Francis, Miranda Leigh Butler, Jeffrey R Guerrieri
Abstract: The National Institute of Standards and Technology(NIST) recently developed a new robotic scanning system for performing near-field measurements at millimeter-wave (mm-wave)frequencies above 100 GHz, the configurable robotic millimeterwave antenna (C ...

2. Millimeter-Wave Near-Field Measurements Using Coordinated Robotics
Topic: Electromagnetics
Published: 10/29/2015
Authors: Joshua A Gordon, David R Novotny, Michael H Francis, Ronald Curtis Wittmann, Alexandra E Curtin, Miranda Leigh Butler, Jeffrey R Guerrieri
Abstract: The National Institute of Standards and Tech- nology (NIST) recently developed a new robotic scan- ning system for performing near-field measurements at millimeter-wave frequencies above 100 GHz, the CROMMA (Configurable Robotic Millimeter-Wave A ...

3. Using the Amplitude Variation of a Reverberation Chamber Channel to Predict the Synchronization of a Wireless Digital Communication Test System
Topic: Electromagnetics
Published: 8/16/2015
Authors: Ray R Tanuhardja, Luis Alberto Gonzalez, Chih-Ming Wang, William F Young, Catherine A Remley
Abstract: This contribution discusses the use of a metric based on the amplitude variation of a channel in the signal bandwidth to predict whether or not a digital wireless communication test system receiver will be able to demodulate a test signal. This metri ...

4. A Differential Form of the Kramers-Kronig Relation for Determining a Lorentz-Type of Refractive Index
Topic: Electromagnetics
Published: 7/22/2015
Authors: Sung Kim, David R Novotny, Joshua A Gordon, Jeffrey R Guerrieri
Abstract: The integral forms of the Kramers-Kronig (KK) relations that relate the real and imaginary parts, n' and n", of a refractive index require the integral to be conducted over the full spectrum. In this paper, we derive a differential form of the KK rel ...

5. Interference and Coexistence of Wireless Systems in Critical Infrastructure
Series: Technical Note (NIST TN)
Report Number: 1885
Topic: Electromagnetics
Published: 7/7/2015
Authors: Galen H. Koepke, William F Young, John M Ladbury, Jason B Coder
Abstract: We examine interference and coexistence testing issues, test methods, and the need to update and develop new test methodologies related to the use of wireless devices in critical infrastructure systems. A case study on interference is presented ...

Topic: Electromagnetics
Published: 6/21/2015
Authors: A Padilla, Alex Watson, Christopher L Holloway, James C Booth
Abstract: This work presents the design, fabrication and characterization results for a thick film (6µm Cu), coplanar waveguide (CPW) resonator operating at 2.2GHz with a high Q (~177), integrated with a microfluidic channel. We demonstrate detection of change ...

7. Amplitude and phase-resolved nano-spectral imaging of surface phonon polaritons in hexagonal boron nitride
Topic: Electromagnetics
Published: 6/9/2015
Authors: Samuel Berweger, Shi Zhiwen, Hans A Bechtel, Sun Yinghui, Zeng Bo, Jin Chenhao, Chang Henry, Michael C. Martin, Markus B. Raschke, Feng Wang
Abstract: Phonon polaritons are quasiparticles resulting from strong coupling of photons with optical phonons. Excitation and control of these quasiparticles in 2D materials offer the opportunity to confine and transport light at the nanoscale. Here, we imag ...

8. Measuring a Device's Susceptibility to LTE: Preliminary Approaches
Topic: Electromagnetics
Published: 3/15/2015
Authors: Jason B Coder, John M Ladbury
Abstract: Previous testing has shown that measuring a device‰s susceptibility to a radiated, broadband signal can present a different set of challenges than those faced when testing with a narrow-band signal. Decisions ranging from choosing a measurement f ...

9. Experimental Bounds on Classical Random Field Theories
Topic: Electromagnetics
Published: 12/10/2014
Authors: Joffrey Kent Peters, Sergey V Polyakov, Jingyun Fan, Alan L Migdall
Abstract: Alternative theories to quantum mechanics motivate important fundamental tests of our understanding and description of the smallest physical systems. Here we place experimental limits on those classical field theories which result in power-depend ...

10. A geometric description of nonreciprocity in coupled two-mode systems
Topic: Electromagnetics
Published: 10/16/2014
Authors: Leonardo M. Ranzani, Jose Alberto Aumentado
Abstract: We explore the concept of nonreciprocity in coupled two-mode systems using a geometric mapping to the Poincaré sphere. From this perspective, we recast the requirements for nonreciprocity in terms of rotation and inversion symmetry arguments for t ...

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