Results 31 to 40 of about 3,669,081 (378)

Effect of Ground Plane Deformation on Electrical Performance of Air Microstrip Antennas

open access: yesInternational Journal of Antennas and Propagation, 2020
This paper covers the variation of electrical performance of air microstrip antennas due to its ground plane deformation. A typical sinusoidal function is utilized to characterize the shape of deformation, based on which different shapes of ground plane ...
Wei Wang   +4 more
doaj   +1 more source

Electronic structure of MnSi: The role of electron-electron interactions

open access: yesPhysical Review B, 2006
We present an experimental study of the electronic structure of MnSi. Using x-ray absorption spectroscopy XAS, x-ray photoemission, and x-ray fluorescence, we provide experimental evidence that MnSi has a mixed valence ground state. We show that self-consistent local density approximation supercell calculations cannot replicate the XAS spectra of MnSi,
Carbone F   +9 more
openaire   +5 more sources

Giant enhancement of nonreciprocity in gyrotropic heterostructures

open access: yesScientific Reports, 2023
Nonreciprocity is a highly desirable feature in photonic media since it allows for control over the traveling electromagnetic waves, in a way that goes far beyond ordinary filtering.
Ioannis Katsantonis   +5 more
doaj   +1 more source

Miniaturized Wideband CP Antenna Using Hybrid Embedded Metasurface Structure

open access: yesIEEE Access, 2022
In this study, a hybrid embedded metasurface (MTS) structure is proposed and applied to realize a miniaturized MTS antenna. In contrast to the conventional periodic rectangular MTS, the proposed MTS structure is formed by hybrid embedded patches composed
Bin Zheng   +4 more
doaj   +1 more source

Electronic structure of turbostratic graphene [PDF]

open access: yes, 2010
We explore the rotational degree of freedom between graphene layers via the simple prototype of the graphene twist bilayer, i.e., two layers rotated by some angle $\theta$.
E. Kandelaki   +4 more
core   +1 more source

Antireflection coated semiconductor laser amplifier for Bose-Einstein condensation experiments

open access: yesAIP Advances, 2018
We present a slave laser highly suitable for the preparation and detection of 87Rb Bose-Einstein condensates (BEC). A highly anti-reflection coated laser diode serves as an optical amplifier, which requires neither active temperature stabilization nor ...
Saurabh Pandey   +7 more
doaj   +1 more source

Coarse and Fine Two-Stage Calibration Method for Enhancing the Accuracy of Inverse Finite Element Method

open access: yesSensors, 2023
The inverse finite element method (iFEM) is a novel method for reconstructing the full-field displacement of structures by discrete measurement strain. In practical engineering applications, the accuracy of iFEM is reduced due to the positional offset of
Jiewei Lu   +3 more
doaj   +1 more source

On the Structure of the Electron [PDF]

open access: yesZeitschrift für Naturforschung A, 2003
Usually the electron is described as a mathematical point with charge, mass, spin angular momentum, and electromagnetic field. Because of the unbounded energies this causes mathematical difficulties [1]. These can be avoided by considering a finite radius.
openaire   +1 more source

Multi-Field-Coupled Model and Solution of Active Electronically Scanned Array Antenna Based on Model Reconstruction

open access: yesInternational Journal of Antennas and Propagation, 2018
Active electronically scanned array antenna (AESA antenna) is capable of controlling the radiation pattern by controlling the feeding phase of the radiating elements. It has good performance and plays an important role in radar systems.
Dan Han   +6 more
doaj   +1 more source

A High-Temperature and Frequency-Reconfigurable Multilayer Frequency Selective Surface Using Liquid Metal

open access: yesIEEE Access, 2022
A high-temperature and frequency-reconfigurable multilayer frequency selective surface (FSS) based on liquid metal is proposed in this work. After construction of a multilayer dielectric cavity with specific dielectric-shaped pillars and the injection of
Peng Li   +4 more
doaj   +1 more source

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