نتایج جستجو برای: frequency selective surfaces fss

تعداد نتایج: 796895  

2016
Ayman Alghamdi Eric Atwell Claire Brierley

This paper aims to implement what is referred to as the collocation of the Arabic keywords approach for extracting formulaic sequences (FSs) in the form of high frequency but semantically regular formulas that are not restricted to any syntactic construction or semantic domain. The study applies several distributional semantic models in order to automatically extract relevant FSs related to Ara...

Journal: :IEEE Transactions on Antennas and Propagation 2021

This article proposes a single-layer, dual-band, optically transparent frequency-selective surface (FSS) for GSM shielding. The design evolves from fractal cross dipole to achieve dual-band response, polarization insensitivity, and wide angle of incidence stability with miniaturized size. A two-axis symmetric structure helps provide stable frequency response incident waves different angles up 6...

2017
P. W. Kämmerer D. G. E. Thiem A. Alshihri G. H. Wittstock R. Bader B. Al-Nawas M. O. Klein

BACKGROUND Mechanostimuli of different cells can affect a wide array of cellular and inter-cellular biological processes responsible for dental implant healing. The purpose of this in vitro study was to establish a new test model to create a reproducible flow-induced fluid shear stress (FSS) of osteoblast cells on implant surfaces. METHODS As FSS effects on osteoblasts are detectable at 10 dy...

2015
Joonbum Park Kyung-Hwan Jin Y. J. Jo E. S. Choi W. Kang E. Kampert J.-S. Rhyee Seung-Hoon Jhi Jun Sung Kim

We report the pressure-induced topological quantum phase transition of BiTeI single crystals using Shubnikov-de Haas oscillations of bulk Fermi surfaces. The sizes of the inner and the outer FSs of the Rashba-split bands exhibit opposite pressure dependence up to P = 3.35 GPa, indicating pressure-tunable Rashba effect. Above a critical pressure P ~ 2 GPa, the Shubnikov-de Haas frequency for the...

Journal: :Waves in Random and Complex Media 2022

In this paper, a flexible, ultra-thin, miniaturized broadband frequency selective surface (FSS) is demonstrated for wideband electromagnetic shielding application. The unit cell of the proposed FSS structure consists cross dipoles loaded with metallic circular strip. has an extremely low profile thickness 0.0009?o and size 0.045?o×0.045?o. This provides more than 20 dB from 1.1 to 2.6 GHz regio...

2016
Taieb Elkarkraoui Gilles Y. Delisle Nadir Hakem

This paper outlines a new polarization reconfigurable EBG (Electromagnetic Band Gap) antenna in the 60 GHz millimeter waves band. The proposed hybrid antenna is composed of a multilayer pyramidal DRA (Dielectric Resonator Antenna) exciting source covered with a FSS (frequency Selective Surface) superstrate. The device can switch between circular and linear polarization by a simple 45 ̊ mechanica...

2016
Nafarizal Nayan Huey Sia Lim Mohd Khairul Ahmad Samsul Haimi Dahlan Mohd Zainizan Sahdan Mohd Kadim Suaidi Badrul Hisham Ahmad Fauzi Mohd Johar Ghaffer Kiani

A major disadvantage of energy saving glass using tin oxide (SnO2) thin film is that SnO2 attenuates the mobile signal from passing through it. In order to improve such signal transmission, a frequency selective surface (FSS) structures are designed on SnO2 thin film. In this paper, SnO2 thin film with FSS structure was fabricated using combination of printed circuit board technology and reacti...

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