Results 31 to 40 of about 629,686 (290)

A Compact Coupled-Fed Loop Antenna for Mobile LTE Smartphones

open access: yesInternational Journal of Antennas and Propagation, 2018
A coupled-fed loop antenna with Octa-bands operation for long-term evolution (LTE) smartphones is proposed in this paper. The antenna occupies a nonground space of only 6.5 mm × 72 mm, and two wide-band operations can be achieved by exploiting the ...
Ping Wang   +3 more
doaj   +1 more source

A Novel Planar Printed Dual-Band Magneto-Electric Dipole Antenna

open access: yesIEEE Access, 2017
In this paper, a novel planar printed dual-band magneto-electric dipole antenna is proposed. The proposed antenna is composed of a conventional bow-tie patch as an electric dipole, a semi-circular loop that operates as a magnetic dipole, a coplanar ...
Chen-Yang Shuai, Guang-Ming Wang
doaj   +1 more source

Wilson loop approach to fragile topology of split elementary band representations and topological crystalline insulators with time reversal symmetry

open access: yes, 2019
We present a general methodology towards the systematic characterization of crystalline topological insulating phases with time reversal symmetry (TRS).~In particular, taking the two-dimensional spinful hexagonal lattice as a proof of principle we study ...
Black-Schaffer, Annica M.   +2 more
core   +1 more source

A Compact Four-Port Coplanar Antenna Based on an Excitation Switching Reconfigurable Mechanism for Cognitive Radio Applications

open access: yesApplied Sciences, 2019
In this paper, we propose a compact four-port coplanar antenna for cognitive radio applications. The proposed antenna consists of a coplanar waveguide (CPW)-fed ultra-wideband (UWB) antenna and three inner rectangular loop antennas. The dimensions of the
Yeonjeong O, Yunnan Jin, Jaehoon Choi
doaj   +1 more source

Banded versus Single-sided bonded space maintainers: A Comparative Study

open access: yesIndian Journal of Dental Sciences, 2018
Background: The present study is conducted to evaluate and compare the clinical performance of conventional band and loop space maintainer and fiber reinforced composite resin (FRCR) space maintainers.
Sudhir Mittal   +5 more
doaj   +1 more source

Limiting Characteristics for Receiving Small Size Frame Antenna Matching Using Converter Negative Impedance

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника, 2018
The limiting characteristics of electrically small-sized loop antenna matching by means of non-Foster's negative inductance are studied. Various options for including negative inductance in frame antenna structure are considered.
A. A. Golovkov, E. I. Mozhaeva
doaj   +1 more source

Heavy eye syndrome in a myopic patient with prior scleral buckle surgery for rhegmatogenous retinal detachment: Differential diagnosis and management

open access: yesAmerican Journal of Ophthalmology Case Reports, 2022
Purpose: To present a challenging case of heavy eye syndrome (HES) in a 56-year-old female who previously underwent scleral buckle surgery in both eyes.
Motazz Alarfaj   +4 more
doaj   +1 more source

Loop Anchor Tension Band Fixation for Olecranon Fractures and Chevron Olecranon Osteotomy

open access: yesTechniques in Hand & Upper Extremity Surgery, 2022
Although tension band wiring is effective for treating olecranon fractures, it is associated with a high reoperation rate because of hardware-related problems. The loop anchor tension band technique is a novel modification of the Arbeitsgemeinschaft für Osteosynthesefragen (AO)-modified tension band wiring technique.
Wei, Ho, Shu-Hsin, Yao, Chun-Ho, Chen
openaire   +2 more sources

Fully Integrated Biopotential Acquisition Analog Front-End IC

open access: yesSensors, 2015
A biopotential acquisition analog front-end (AFE) integrated circuit (IC) is presented. The biopotential AFE includes a capacitively coupled chopper instrumentation amplifier (CCIA) to achieve low input referred noise (IRN) and to block unwanted DC ...
Haryong Song   +3 more
doaj   +1 more source

Research on design method of double-loop electric servo loading system with high-frequency band based on H∞ control strategy

open access: yesMeasurement + Control, 2020
In the hardware-in-the-loop simulation, the goal of electric loading is to realize the accurate tracking of the torque signal and test the performance of the aircraft actuator system.
Yang Shui, Jianli Wei, Jie Yan
doaj   +1 more source

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