Results 71 to 80 of about 750,689 (337)
The equiangular spiral antenna
IRE Transactions on Antennas and Propagation, 1959 A circularly polarized antenna is described which makes possible bandwidths that a few years ago were considered to be impossible. The design of the antenna is based upon the simple fundamental principle that if the shape of the antenna were such that it could be specified entirely by angles, its performance would be independent of wavelength.
openaire +2 more sources
Advanced Engineering Materials, EarlyView.Sol–gel‐derived ZnO–rGO hybrid nanoparticles enable Al7075 powder‐metallurgy composites to achieve concurrent gains in hardness and thermal conductivity while markedly lowering friction and wear. The hybrid architecture couples ZnO‐based load support with rGO‐assisted lamellar sliding and heat spreading, revealing a promising route toward lightweight ...
Bunyamin Aksakal +3 more
wiley +1 more source
External and coplanar feeding for spiral antenna
, 2010 International audienceSpiral antennas are usually fed in the center by a balanced signal. However, in some configurations, it is not always possible to feed the antenna in the center. In this paper, an externally-fed spiral antenna is studied.
Hélier, Marc +7 more
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Advanced Functional Materials, EarlyView.DNA strands are employed both as dynamic linkers and nanoscale templates for the integration of Ag2S nanoparticles on MoS2, which in turn imparted photothermal responsiveness; this feature permits the selective cargo (fluorophore, quantum dots or an enzyme) release from the MoS2 surface in response to local heat induced by light irradiation.
Kai Chen +3 more
wiley +1 more source
Compact RFID tag antenna based on square spiral resonator
物联网学报A miniaturized ultra-high frequency (UHF) radio frequency identification (RFID) tag antenna was designed.The antenna was composed of two square spiral resonators shorted inside and outside.By adjusting the edge length of the outer ring spiral resonator ...
Libin DAI, Zhimeng XU, Jiade YUAN
doaj +2 more sources
Multiband circularly polarised CubeSat antenna operating in S, C, X, Ku, K, and Ka bands
IET Microwaves, Antennas & PropagationA novel design of a high‐frequency multiband with a circular polarisation antenna based on a four‐patch antenna system consolidated with an Archimedean spiral antenna for CubeSat applications.
Hesham M. Elkady +2 more
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A Rectangular Planar Spiral Antenna for GIS Partial Discharge Detection
International Journal of Antennas and Propagation, 2014 A rectangular planar spiral antenna sensor was designed for detecting the partial discharge in gas insulation substations (GIS). It can expediently receive electromagnetic waves leaked from basin-type insulators and can effectively suppress low frequency
Xiaoxing Zhang +3 more
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Advanced Functional Materials, EarlyView.A bikitaite‐infused cellulose separator is introduced for Li metal batteries, leveraging bikitaite zeolite's ion‐conductive properties to regulate Li+‐ion flux and suppress dendrite growth. The membrane design ensures uniform Li plating, enhanced electrolyte wettability, and robust thermal/mechanical stability, delivering stable performance and low ...
Isheunesu Phiri +2 more
wiley +1 more source
A Compact Microstrip Spiral Antenna Embedded in Water Bolus for Hyperthermia Applications
International Journal of Antennas and Propagation, 2013 This paper presents the design, simulation, fabrication, and measurement of a circular spiral microstrip antenna embedded in distilled water bolus. The antenna is mainly designed to operate at 434 MHz ISM band to be used for a hyperthermia applicator ...
Erdal Korkmaz +2 more
doaj +1 more source
Приборы и методы измерений, 2019 Mirror antenna systems are widely used in satellite and space communication systems and radio astronomy. Development of these areas requires new efficient antenna systems' design. Possible technical solution for creating an effective mirror antenna is a “
D. V. Douksha +2 more
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