Results 71 to 80 of about 17,188 (287)
Engineering Science and Technology, an International JournalIn this article a high gain (≈13dBi) circularly polarized dielectric resonator antenna (DRA) has been designed with silicon and graphene based nano materials for 6G terahertz (THz) nano communication and bio sensing applications. This antenna having 2.2 %
Shipra Srivastava +4 more
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Resolving the Structural Duality of Graphene Grain Boundaries
Advanced Materials, EarlyView.Cantilever ncAFM resolves the atomic structure of grain boundaries in graphene, revealing coexisting stable and metastable types. Both contain pentagon/heptagon defects, but metastable GBs show irregular geometries. Modeling shows metastable GBs form under compression, exhibiting vertical corrugation, while stable GBs are flat.
Haojie Guo +11 more
wiley +1 more source
Planar Resonators for Metamaterials [PDF]
, 2012 This paper presents the results of an investigation into a combination of electric and magnetic planar resonators in order to design the building element of a volumetric metamaterial showing simultaneously negative electric and magnetic polarizabilities ...
Blaha, M., Machac, J.
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Spin‐Split Edge States in Metal‐Supported Graphene Nanoislands Obtained by CVD
Advanced Materials, EarlyView.Combining STM measurements and ab‐initio calculations, we show that zig‐zag edges in graphene nanoislands grown on Ni(111) by CVD retrieve their spin‐polarized edge states after intercalation of a few monolayers of Au. ABSTRACT Spin‐split states localized on zigzag edges have been predicted for different free‐standing graphene nanostructures.
Michele Gastaldo +6 more
wiley +1 more source
Investigation on Harmonic Tuning for Active Ku-Band Rectangular Dielectric Resonator Antennas
International Journal of Antennas and Propagation, 2008 A slot-coupled rectangular dielectric resonator antenna (DRA) operating in the 14–14.5 GHz frequency band is investigated as a possible radiating element for an active integrated antenna of a transmitting phased array.
Anda Guraliuc +4 more
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Band‐notched UWB rectangular dielectric resonator antenna
Electronics Letters, 2014 A new ultra‐wideband (UWB) rectangular dielectric resonator antenna (DRA) with band‐stop performance is proposed. Two symmetrical short‐circuited strips together with a slot etched in the feeding patch are introduced to form the notched band. The design principles of the proposed methods are described in detail.
Yong Feng Wang +3 more
openaire +1 more source
Flexible Dielectric Acoustic Resonator Patch for Tissue Regeneration
Advanced Materials, EarlyView.A flexible dielectric acoustic resonator patch enables MHz‐range ultrasound generation through resonance amplification without using piezoelectric materials. Conformal integration on a curved substrate allows efficient acoustic delivery to tissue‐mimicking environments.
Donyoung Kang +7 more
wiley +1 more source
Multiwavelength Achromatic Metasurfaces by Dispersive Phase Compensation
, 2015 The replacement of bulk refractive optical elements with diffractive planar components enables the miniaturization of optical systems. However, diffractive optics suffers from large chromatic aberrations due to the dispersion of the phase accumulated by ...
Aieta, Francesco +3 more
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Advanced Materials, EarlyView.We introduce a molecular strategy to assemble one‐dimensional (1D) materials into two‐dimensional (2D) van der Waals metal–organic frameworks (MOFs). Crystals of [FeX(pzX)(bpy)] (X = Cl, F) form anisotropic 2D layers that can be mechanically exfoliated into thin sheets.
Eleni C. Mazarakioti +12 more
wiley +1 more source
Micromachined Millimetre-Wave Passive Components at 38 and 77 GHz [PDF]
, 2009 A precision micro-fabrication technique has been developed for millimetre-wave components of air-filled three-dimensional structures, such as rectangular coaxial lines or waveguides.
Huang, F. +4 more
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