Search Results - "York, R A"

Pyrosilviculture Needed for Landscape Resilience of Dry Western United States Forests by North, M P, York, R A, Collins, B M, Hurteau, M D, Jones, G M, Knapp, E E, Kobziar, L, McCann, H, Meyer, M D, Stephens, S L, Tompkins, R E, Tubbesing, C L

“…Abstract A significant increase in treatment pace and scale is needed to restore dry western US forest resilience owing to increasingly frequent and severe…”
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Realization of high tunability barium strontium titanate thin films by rf magnetron sputtering by Padmini, P., Taylor, T. R., Lefevre, M. J., Nagra, A. S., York, R. A., Speck, J. S.

“…Ferroelectric thin films are currently being used to develop tunable microwave circuits based on the electric-field dependence of the dielectric constant…”
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Impact of thermal strain on the dielectric constant of sputtered barium strontium titanate thin films by Taylor, T. R., Hansen, P. J., Acikel, B., Pervez, N., York, R. A., Streiffer, S. K., Speck, J. S.

“…Barium strontium titanate thin films were deposited by sputtering on Pt/SiO2 structures using five different host substrates: magnesium oxide, strontium…”
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A new phase-shifterless beam-scanning technique using arrays of coupled oscillators by Liao, P., York, R.A.

“…A method for electronic beam scanning in linear arrays of antenna-coupled oscillators is introduced which eliminates the need for phase shifters. It is shown…”
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Nonlinear analysis of phase relationships in quasi-optical oscillator arrays by York, R.A.

“…A dynamic theory of coupled oscillators is developed and applied to the class of loosely coupled quasi-optical oscillator arrays. This theory permits the…”
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Head mounted telemetry system for seizures monitoring and sleep scoring on non-human primate by Vuong, J.S., Garrett, J.J., Connolly, M.J., York, A.R., Gross, R.E., Devergnas, A.

“…•Our new 3D printed design allow for long time telemetry recording on monkey.•EEG monitoring can be performed for several months.•This method refines the…”
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Effect of thermal strain on the ferroelectric phase transition in polycrystalline Ba0.5Sr0.5TiO3 thin films studied by Raman spectroscopy by Tenne, D. A., Soukiassian, A., Xi, X. X., Taylor, T. R., Hansen, P. J., Speck, J. S., York, R. A.

“…We have applied Raman spectroscopy to study the influence of thermal strain on the vibrational properties of polycrystalline Ba0.5Sr0.5TiO3 films. The films…”
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A 3-10-GHz GaN-based flip-chip integrated broad-band power amplifier by Xu, J.J., Keller, S., Parish, G., Heikman, S., Mishra, U.K., York, R.A.

“…In this paper, we report the latest progress of a GaN-based broad-band power amplifier using AlGaN/GaN high electron mobility transistors (HEMTs), grown on…”
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Quasi-optical power combining using mutually synchronized oscillator arrays by York, R.A., Compton, R.C.

“…A quasi-optical method for solid-state power combining with applications to high-power millimeter-wave generation is discussed. The approach uses…”
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High tunability barium strontium titanate thin films for rf circuit applications by Pervez, N. K., Hansen, P. J., York, R. A.

“…Large variations in the permittivity of rf magnetron sputtered thin-film barium strontium titanate have been obtained through optimization of growth conditions…”
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Active integrated antennas by Chang, K., York, R.A., Hall, P.S., Itoh, T.

“…This paper provide a review of the active integrated antenna (AIA) technologies. After a brief introduction on the definition and some historical remarks, the…”
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Quasi-optical and spatial power combining by DeLisio, M.P., York, R.A.

“…Quasi-optical power-combining techniques have been developed to address fundamental limitations in solid-state devices and circuits. These techniques have been…”
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Modeling the capacitive nonlinearity in thin-film BST varactors by Chase, D.R., Lee-Yin Chen, York, R.A.

“…A simple closed-form expression for the dielectric nonlinearity in thin-film high-permittivity barium strontium titanate (BST) devices is obtained from a…”
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Low-loss distributed MEMS phase shifter by Borgioli, A., Yu Liu, Nagra, A.S., York, R.A.

“…This letter presents a one-bit low-loss K/K/sub a/-band phase shifter circuit that employs microelectromechanical systems (MEMS) capacitors. The measured…”
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The effect of gate leakage on the noise figure of AlGaN/GaN HEMTs by Sanabria, C., Chakraborty, A., Hongtao Xu, Rodwell, M.J., Mishra, U.K., York, R.A.

“…The effect of gate leakage on the noise figure of AlGaN/GaN high electron mobility transistor (HEMTs) is explored. It is shown that these devices have a…”
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Distributed analog phase shifters with low insertion loss by Nagra, A.S., York, R.A.

“…This paper describes the design and fabrication of distributed analog phase-shifter circuits. The phase shifters consist of coplanar-waveguide (CPW) lines that…”
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Tunable Passive Integrated Circuits Using BST Thin Films by Serraiocco, J., Acikel, B., Hansen, P., Taylor, T., Xu, H., Speck, J. S., York, R. A.

“…Preliminary results from our work on compact phase shifters using BaSrTiO 3 thin films are presented. A reflection phase shifter utilizing a lumped element…”
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Edge effects in mixed conifer group selection openings: tree height response to resource gradients by York, Robert A, Battles, John J, Heald, Robert C

“…Replicated circular openings ranging in size from 0.1 to 1 ha were cleared on a Sierran mixed conifer forest in 1996 at the Blodgett Forest Research Station,…”
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Broad-band high-power amplifier using spatial power-combining technique by Pengcheng Jia, Lee-Yin Chen, Alexanian, A., York, R.A.

“…High power, broad bandwidth, high linearity, and low noise are among the most important features in amplifier design. The broad-band spatial power-combining…”
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A 120-W X-band spatially combined solid-state amplifier by Nai-Shuo Cheng, Pengcheng Jia, Rensch, D.B., York, R.A.

“…In this paper, we present new results in the development of a broad-band spatial power-combining system implemented in a standard X-band waveguide environment…”
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