Results 51 to 60 of about 1,112,681 (393)
The Atacama Large Millimeter/submillimeter Array: Overview & status [PDF]
, 2006 The Atacama Large Millimeter/submillimeter Array (ALMA) is an international radio telescope under construction in the Atacama Desert of northern Chile. ALMA will be situated on a high-altitude site at 5000 m elevation which provides excellent atmospheric
Beasley, A. J. +2 more
core +2 more sources
Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM
FEBS Letters, EarlyView.Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley +1 more source
A Compact Dual-Band Circularly Polarized Antenna with Wide HPBWs for CNSS Applications
International Journal of Antennas and Propagation, 2018 A compact dual-band circularly polarized antenna with wide half-power beamwidths (HPBWs) for compass navigation satellite system applications is proposed in this paper. The CP radiation is realized by arranging four compact dual-band inverted-F monopoles
Chao Li +3 more
doaj +1 more source
User Impact on Phased and Switch Diversity Arrays in 5G Mobile Terminals
IEEE Access, 2018 In this paper, a mobile terminal phased array at 28 GHz with different scan angles is compared with a switch diversity antenna array at 28 GHz in the case of antenna beams pointing at the user's body.
Igor Syrytsin +2 more
doaj +1 more source
IEEE Access, 2020 The analysis of the target's broadband electromagnetic scattering characteristics plays an important role in radar stealth and recognition areas. The traditional method of moments (MoM) needs to calculate the currents at each frequency point when ...
Xing Wang +5 more
doaj +1 more source
An intracellular transporter mitigates the CO2‐induced decline in iron content in Arabidopsis shoots
FEBS Letters, EarlyView.This study identifies a gene encoding a transmembrane protein, MIC, which contributes to the reduction of shoot Fe content observed in plants under elevated CO2. MIC is a putative Fe transporter localized to the Golgi and endosomal compartments. Its post‐translational regulation in roots may represent a potential target for improving plant nutrition ...
Timothy Mozzanino +7 more
wiley +1 more source
IEEE Access, 2022 A low-profile circularly-polarized sequential rotation fed $4\times 4$ array antenna working in the Ka-band from 27.5 GHz to 31 GHz is presented. The particularity of the antenna lies in its single-layer sequential rotation feed network implemented in ...
Miguel Ferrando-Rocher +3 more
doaj +1 more source
Metasurface Antennas: New Models, Applications and Realizations
Scientific Reports, 2019 This paper presents new designs, implementation and experiments of metasurface (MTS) antennas constituted by subwavelength elements printed on a grounded dielectric slab.
M. Faenzi +6 more
semanticscholar +1 more source
Millimeter Wave Communications with Reconfigurable Antennas
, 2018 The highly sparse nature of propagation channels and the restricted use of radio frequency (RF) chains at transceivers limit the performance of millimeter wave (mmWave) multiple-input multiple-output (MIMO) systems. Introducing reconfigurable antennas to
He, Biao, Jafarkhani, Hamid
core +1 more source
High-rate codes that are linear in space and time [PDF]
, 2002 Multiple-antenna systems that operate at high rates require simple yet effective space-time transmission schemes to handle the large traffic volume in real time.
Hassibi, Babak, Hochwald, Bertrand M.
core +2 more sources