scholarly journals Modulating Elastic Band Gap Structure in Layered Soft Composites Using Sacrificial Interfaces

2016 ◽  
Vol 83 (11) ◽  
Author(s):  
Qianli Chen ◽  
Ahmed Elbanna
Keyword(s):  
Band Gap ◽  
Wide Band ◽  
Building Blocks ◽  
Bragg Diffraction ◽  
Layer By Layer ◽  
Elastic Band ◽  
Layered Architecture ◽  
Wide Range ◽  
Band Gap Structure ◽  
Gap Structure

A wide range of engineered and natural composites exhibit a layered architecture whereby individual building blocks are assembled layer by layer using cohesive interfaces. We present a novel mechanism for evolving acoustic band gap structure in a model system of these composites through patterning the microstructure in a way that triggers nonplanar interfacial deformations between the layers as they are stretched. Through the controlled deformation and growth of interlayer channels under macroscopic tension, we observe the emergence of multiple wide band gaps due to Bragg diffraction and local resonance. We describe these phenomena in details for three example microstructures and discuss the implications of our approach for harnessing controlled deformation in modulating band gap properties of composite materials.

scholarly journals Novel EBG Structure BPF for UWB system

2019 ◽  
Vol 8 (6S2) ◽  
pp. 477-479
Keyword(s):  
Band Gap ◽  
Wide Band ◽  
Handheld Devices ◽  
Design System ◽  
Pass Band ◽  
System Software ◽  
Band Region ◽  
Electro Magnetic ◽  
Band Gap Structure ◽  
Gap Structure

This paper discuses about application of Electro Magnetic Band-gap structure(EBG) application in design of microstrip band bass filter(BPF) in ultra wide band(UWB) frequency. Here to obtain improved pass-band region and good out of band region a single Electro Magnetic Band-gap structure (EBG) cell is used. The simulation of the filter is done using advanced design system software (ADS), the obtained result is satisfactory .in addition to the performance of the filter the size of overall filter is reduced in size which can be used in many compact handheld devices. [19],[20],[21]

Electromagnetic Band Gap Structure for Planar Ultra Wide Band Antenna

2010 ◽  
Vol 24 (2-3) ◽  
pp. 229-239 ◽  
Author(s):  
T. Masri ◽  
M. K. A. Rahim ◽  
H. A. Majid ◽  
O. Ayop ◽  
F. Zubir ◽  
...  
Keyword(s):  
Band Gap ◽  
Wide Band ◽  
Ultra Wide Band ◽  
Electromagnetic Band Gap ◽  
Band Gap Structure ◽  
Gap Structure

A layer‐by‐layer metallic photonic band‐gap structure

1996 ◽  
Vol 68 (19) ◽  
pp. 2759-2761 ◽  
Author(s):  
J. S. McCalmont ◽  
M. M. Sigalas ◽  
G. Tuttle ◽  
K.‐M. Ho ◽  
C. M. Soukolis
Keyword(s):  
Band Gap ◽  
Photonic Band Gap ◽  
Layer By Layer ◽  
Photonic Band Gap Structure ◽  
Band Gap Structure ◽  
Photonic Band ◽  
Gap Structure

Efficient Prediction of Structural and Electronic Properties of Hybrid 2D Materials Using DFT and Machine Learning

2018 ◽  
Author(s):  
Sherif Tawfik ◽  
Olexandr Isayev ◽  
Catherine Stampfl ◽  
Joseph Shapter ◽  
David Winkler ◽  
...  
Keyword(s):  
Machine Learning ◽  
Band Gap ◽  
Density Functional ◽  
2D Materials ◽  
Van Der Waals ◽  
Building Blocks ◽  
Machine Learning Techniques ◽  
Interlayer Distance ◽  
Computational Screening ◽  
Wide Range

Materials constructed from different van der Waals two-dimensional (2D) heterostructures offer a wide range of benefits, but these systems have been little studied because of their experimental and computational complextiy, and because of the very large number of possible combinations of 2D building blocks. The simulation of the interface between two different 2D materials is computationally challenging due to the lattice mismatch problem, which sometimes necessitates the creation of very large simulation cells for performing density-functional theory (DFT) calculations. Here we use a combination of DFT, linear regression and machine learning techniques in order to rapidly determine the interlayer distance between two different 2D heterostructures that are stacked in a bilayer heterostructure, as well as the band gap of the bilayer. Our work provides an excellent proof of concept by quickly and accurately predicting a structural property (the interlayer distance) and an electronic property (the band gap) for a large number of hybrid 2D materials. This work paves the way for rapid computational screening of the vast parameter space of van der Waals heterostructures to identify new hybrid materials with useful and interesting properties.

RCS Reduction of Patch Array Antenna by Electromagnetic Band-Gap Structure

2012 ◽  
Vol 11 ◽  
pp. 1048-1051 ◽  
Author(s):  
Jiejun Zhang ◽  
Junhong Wang ◽  
Meie Chen ◽  
Zhan Zhang
Keyword(s):  
Band Gap ◽  
Array Antenna ◽  
Electromagnetic Band Gap ◽  
Band Gap Structure ◽  
Gap Structure
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