Results 51 to 60 of about 36,933 (358)
Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications
Advanced Functional Materials, EarlyView.Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai +8 more
wiley +1 more source
Effects of a reentry plasma sheath on the beam pointing properties of an array antenna
AIP Advances, 2018 The reduction in the gain of an on-board antenna caused by a reentry plasma sheath is an important effect that contributes to the reentry “blackout” problem.
Bowen Bai +3 more
doaj +1 more source
Research on Quantization Error Influence of Millimeter-Wave Phased Array Antenna
International Journal of Antennas and Propagation, 2021 The millimeter-wave phased array antenna is a higher integration system that is composed of different subarray modules, and in actual engineering, the existing amplitude, phase errors, and structural errors will change the performance of the array ...
Haigen Yang +10 more
doaj +1 more source
Sensors, 2021 This paper illustrates the application of CORPS (coherently radiating periodic structures) for feeding 2-D phased arrays with a reduced number of phase shifter (PS) devices. Three design configurations using CORPS are proposed for 2-D phased arrays.
Elizvan Juárez +3 more
doaj +1 more source
Phase Calibration of Distributed Antenna Arrays [PDF]
, 2023 Erik G. Larsson +1 more
openalex +1 more source
Advanced Functional Materials, EarlyView.HKUST‐1/TiO2 composite materials show a very high photocatalytic hydrogen evolution rate which increases as a function of the irradiation time until reaching a plateau and even surpasses the performance of the 1%Pt/TiO2 material after three photocatalytic cycles.
Alisha Khan +9 more
wiley +1 more source
Spiral slotted phased antenna array [PDF]
, 1982 A flush mounting, cavity-backed, dual orthogonal slot antenna for aircraft and space vehicles is described. Improved radiation pattern characteristics are obtained by making the spiral slot pattern elliptical in the aperture plane. A cavity and a flanged
Ellis, H., Jr.
core +1 more source
The Journal of Engineering, 2019 A large aperture membrane phased array antenna with an array antenna and transmit/receive (T/R) modules is presented for geosynchronous Earth orbit synthetic aperture radar applications.
Mingming Xu +5 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Cu‐based catalysts as a cornerstone in advancing sustainable energy technologies are fully reviewed in this manuscript, highlighting their potential in photo‐ and electrocatalysis. It includes metallic copper, copper oxides, copper sulfides, copper halide perovskites, copper‐based metal–organic frameworks (MOFs), and covalent organic frameworks (COFs),
Jéssica C. de Almeida +16 more
wiley +1 more source
Accurate Antenna Pattern Modelling for Spaceborne Active Phased Array Antennas [PDF]
, 2010 The paper describes the calibration and monitoring of the TerraSAR-X phased array ...
Bachmann, Markus +3 more
core +1 more source