Results 31 to 40 of about 17,319,082 (292)
Solid state optical conjugated polymer amplifier; with ultrafast gain switching [PDF]
, 2008 Conjugated polymers are organic materials which are attractive as optoelectronic devices because they have a combination of broad band emission, high gain, versatility in processing, are ductile and can be electrically pumped.
Amarasinghe, Dimali C. V.
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IEEE Access, 2018 In this paper, an aperture efficient wideband high-gain patch antenna is designed using a novel multilayer-based metamaterial structure combined with a reactive impedance surface (RIS)-backed patch antenna.
Basudev Majumder +2 more
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Updating the gain of global finite-time high gain observers [PDF]
IEEE Conference on Decision and Control and European Control Conference, 2011 Recently, new results about semi-global and global finite-time observation have been obtained by the use of continuous high gain observers. In this paper, we propose to extend these results by studying “time-varying high gain” observers and by providing new update laws: first, we adapt the law introduced by L.
Burlion, Laurent +2 more
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IEEE Access, 2019 The development of wireless and satellite communication has led to a demand for high-performance microwaves and mm-wave components in terms of cost, losses, and fabrication complexity.
Syed M. Sifat +3 more
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High Refractive Index Metamaterial Superstrate for Microstrip Patch Antenna Performance Improvement
Frontiers in Physics, 2020 We propose a high refractive index metamaterial (HRIM)that is composed of two identical patch arrays symmetrically etched on both sides of a dielectric plate.
Xi Gao, Yan Zhang, Simin Li
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LONGITUDINAL MODES IN A HIGH-GAIN LASER [PDF]
Applied Physics Letters, 1970 In lasers employing high-gain narrow-linewidth transitions the theory predicts major departures of the mode-splitting frequencies from their low-gain values as well as a new type of mode splitting. The first of these effects consisting of a reduction by a factor of 2.5 of the mode splitting in a xenon 3.51-μ laser is observed experimentally.
Casperson, Lee, Yariv, Amnon
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, 2012 BACKGROUND AND PURPOSE: Recovery after stroke occurs on the basis of specific molecular events. Genetic polymorphisms associated with impaired neural repair or plasticity might reduce recovery from stroke and might also account for some of the ...
PROCACCIO V +4 more
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Elevated pulse pressure during the acute period of ischemic stroke is associated with poor stroke outcome [PDF]
, 2004 <p><b>Background:</b> It is controversial which component of blood pressure (BP) during acute period of stroke best predicts outcome.
Lees, K.R. +6 more
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High-Gain Dual-Band Dual-Sense Circularly Polarized Spiral Series-Fed Patch Antenna
IEEE Open Journal of Antennas and Propagation, 2022 This paper demonstrates a dual-band circularly polarized (CP) two-dimensional (2D) series-fed patch array antenna. The CP rotating sense in each band is opposite to each other, which makes them well-suited for the downlink and uplink in satellite ...
Nghia Nguyen-Trong +2 more
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IET Microwaves, Antennas & PropagationThis paper proposes a polarisation‐insensitive absorptive metamaterial unit cell that achieves a perfect absorption of circularly polarised (CP) incident waves. To overcome the miniaturisation limitations inherent in conventional metamaterial designs, an
Guanjun Wang +4 more
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