D
David R. Smith
Researcher at Duke University
Publications - 891
Citations - 102589
David R. Smith is an academic researcher from Duke University. The author has contributed to research in topics: Metamaterial & Antenna (radio). The author has an hindex of 110, co-authored 881 publications receiving 91683 citations. Previous affiliations of David R. Smith include Brunel University London & Princeton University.
Papers
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Short-scale turbulent fluctuations driven by the electron-temperature gradient in the national spherical torus experiment.
E. Mazzucato,David R. Smith,R. E. Bell,Stanley Kaye,J. C. Hosea,B.P. LeBlanc,James R. Wilson,P.M. Ryan,Calvin Domier,Neville C. Luhmann,Howard Yuh,Woochang Lee,Hyeon K. Park +12 more
TL;DR: Experimental observations and agreement with numerical results from a linear gyrokinetic stability code support the conjecture that the observed turbulence is driven by the electron-temperature gradient.
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Thin low-loss dielectric coatings for free-space cloaking
TL;DR: St stereolithographic polymer-based fabrication and experimental operation of a microwave X-band cloaking device, a relatively thin shell of an air-dielectric composite, in which the dielectric component has negligible loss and dispersion.
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Performance of a three dimensional transformation-optical-flattened Lüneburg lens
Tom Driscoll,Guy Lipworth,John Desmond Hunt,Nathan Ingle Landy,Nathan Kundtz,Dimitri Basov,David R. Smith +6 more
TL;DR: Both the beam-forming and imaging capabilities of an X-band (8-12 GHz) operational Lüneburg lens are demonstrated, one side of which has been flattened via a coordinate transformation optimized using quasi-conformal transformation optics (QCTO) procedures.
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Indirect Holographic Techniques for Determining Antenna Radiation Characteristics and Imaging Aperture Fields
TL;DR: In this paper, a practical method of applying indirect holographic techniques to microwave antennas is described, where a technique originally developed at optical frequencies can be adapted to enable measurements to be taken on microwave antennas.
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Analysis of the power dependent tuning of a varactor-loaded metamaterial at microwave frequencies
TL;DR: In this paper, an analysis of the nonlinear, power-dependent resonance frequency shift for two metamaterial mediums consisting of arrays of varactor-loaded split ring resonators (VLSRRs) is presented.