Two-Dimensional Fibre Array Design and Characterisation for Holographic Wavelength Selective Switching Devices

2006 ◽  
Author(s):  
Cedric Letort ◽  
Bruno Fracasso
Keyword(s):  
Two Dimensional ◽  
Array Design ◽  
Switching Devices

scholarly journals A Fast Two-Dimensional Numerical Method for the Wake Simulation of a Vertical Axis Wind Turbine

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 49
Author(s):  
Zheng Yuan ◽  
Jin Jiang ◽  
Jun Zang ◽  
Qihu Sheng ◽  
Ke Sun ◽  
...  
Keyword(s):  
Velocity Distribution ◽  
Numerical Method ◽  
Three Dimensional ◽  
Particle Method ◽  
Vortex Method ◽  
Vertical Axis ◽  
Two Dimensional ◽  
Vertical Axis Wind Turbine ◽  
Wake Effect ◽  
Array Design

In the array design of the vertical axis wind turbines (VAWT), the wake effect of the upstream VAWT on the downstream VAWT needs to be considered. In order to simulate the velocity distribution of a VAWT wake rapidly, a new two-dimensional numerical method is proposed, which can make the array design easier and faster. In this new approach, the finite vortex method and vortex particle method are combined to simulate the generation and evolution of the vortex, respectively, the fast multipole method (FMM) is used to accelerate the calculation. Based on a characteristic of the VAWT wake, that is, the velocity distribution can be fitted into a power-law function, a new correction model is introduced to correct the three-dimensional effect of the VAWT wake. Finally, the simulation results can be approximated to the published experimental results in the first-order. As a new numerical method to simulate the complex VAWT wake, this paper proves the feasibility of the method and makes a preliminary validation. This method is not used to simulate the complex three-dimensional turbulent evolution but to simulate the velocity distribution quickly and relatively accurately, which meets the requirement for rapid simulation in the preliminary array design.

Synthetic sparse planar array design for two-dimensional DOA estimation

2021 ◽  
pp. 103268
Author(s):  
Xiangnan Li ◽  
Weijiang Wang ◽  
Xiaohua Wang ◽  
Shiwei Ren
Keyword(s):  
Doa Estimation ◽  
Two Dimensional ◽  
Array Design ◽  
Planar Array

scholarly journals Antenna Array Design for LOS-MIMO and Gigabit Ethernet Switch-Based Gbps Radio System

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Chunhui Zhou ◽  
Xiang Chen ◽  
Xiujun Zhang ◽  
Shidong Zhou ◽  
Ming Zhao ◽  
...  
Keyword(s):  
Antenna Array ◽  
Spectrum Efficiency ◽  
Design Rule ◽  
Two Dimensional ◽  
Ofdm System ◽  
Array Design ◽  
Multiplexing Gain ◽  
Radio System ◽  
Gigabit Ethernet ◽  
Mimo Ofdm

The high spectrum efficiency of multiple-input multiple-output (MIMO) transmission traditionally depends on the high multiplexing gain in rich scattering environments, which will not always hold in the line-of-sight (LOS) environments, especially at higher microwave frequency band. In this paper, a novel antenna array design rule is proposed to guarantee full multiplexing gain for LOS-MIMO systems with one- or two-dimensional antenna arrays in LOS scenarios, and the strict perpendicular constraint is released in the two-dimensional case. The minimum antenna array area and the performance sensitivity to the area error are also obtained to guide the practical system design. Then, a demo MIMO-OFDM system with the designed square antenna array at 15 GHz carrier is implemented on a novel Gigabit Ethernet (GE) switch-based software defined radio (SDR) platform, which combines the hardware accelerating units (HAUs) with the general-purpose processors (GPPs). The field evaluation results show that the system throughput and spectrum efficiency are greater than 1 Gbps and 15 bps/Hz, respectively. To the best of our knowledge, it is the first time to demonstrate the Gbps LOS-MIMO-OFDM system at such microwave bands in the world, which can be a successful design example for the next generation wireless backhaul or fixed wireless access.

A two-dimensional hexagonal boron nitride/polymer nanocomposite for flexible resistive switching devices

2017 ◽  
Vol 5 (4) ◽  
pp. 862-871 ◽  
Author(s):  
Ghayas Uddin Siddiqui ◽  
Muhammad Muqeet Rehman ◽  
Young-Jin Yang ◽  
Kyung Hyun Choi
Keyword(s):  
Boron Nitride ◽  
Resistive Switching ◽  
Electronic Device ◽  
Hexagonal Boron Nitride ◽  
Polymer Nanocomposite ◽  
Hybrid Nanocomposites ◽  
Two Dimensional ◽  
Inorganic Hybrid ◽  
Device Applications ◽  
Switching Devices

Organic–inorganic hybrid nanocomposites are an attractive choice for various electronic device applications.

Fabrication of CdZnTe Strip Detectors for Large Area Arrays

1997 ◽  
Vol 487 ◽  
Author(s):  
C. M. Stahle ◽  
Z. Q. Shi ◽  
K. Hu ◽  
S. D. Barthelmy ◽  
S. J. Snodgrass ◽  
...  
Keyword(s):  
Gamma Ray ◽  
High Resolution Imaging ◽  
Two Dimensional ◽  
Large Area ◽  
Array Design ◽  
Nuclear Medical Imaging ◽  
Strip Detectors ◽  
Resolution Imaging ◽  
Strip Detector ◽  
Imaging And Spectroscopy

AbstractA CdZnTe strip detector large area array (∼ 60 cm2 with 36 detectors) with capabilities for high resolution imaging and spectroscopy has been built as a prototype for a space flight gamma ray burst instrument. The detector array also has applications in nuclear medical imaging. Two dimensional orthogonal strip detectors with 100 μm pitch have been fabricated and tested. Details for the array design, fabrication and evaluation of the detectors will be presented.

Fabrication of Cdznte Strip Detectors for Large Area Arrays

1997 ◽  
Vol 484 ◽  
Author(s):  
C. M. Stahle ◽  
Z. Q. Shi ◽  
K. Hu ◽  
S. D. Barthelmy ◽  
S. J. Snodgrass ◽  
...  
Keyword(s):  
Gamma Ray ◽  
High Resolution Imaging ◽  
Two Dimensional ◽  
Large Area ◽  
Array Design ◽  
Nuclear Medical Imaging ◽  
Strip Detectors ◽  
Resolution Imaging ◽  
Strip Detector ◽  
Imaging And Spectroscopy

AbstractA CdZnTe strip detector large area array (∼ 60 cm2 with 36 detectors) with capabilities for high resolution imaging and spectroscopy has been built as a prototype for a space flight gamma ray burst instrument. The detector array also has applications in nuclear medical imaging. Two dimensional orthogonal strip detectors with 100 gm pitch have been fabricated and tested. Details for the array design, fabrication and evaluation of the detectors will be presented.

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