نتایج جستجو برای: electromagnetic wave interference

تعداد نتایج: 373760  

Journal: :Journal of physics 2023

Abstract With regard to the threat of Unmanned Aerial Vehicle(UAV) clusters, mechanism and rule damage UAV cluster caused by electromagnetic wave is explored in this paper. A typical satellite navigation antenna high power radiation studied with experimental simulation, which, sensitive parts threshold obtained, which provides support for interference enemy protection research our own.

2016
Hana URBANCOKOVA Jan VALOUCH Stanislav KOVAR Milan ADAMEK Tomas Bata

Measuring the level of electromagnetic interference emitted by electronic devices is an important part of the process of production and development of these devices. Today, these measurements are performed by specialized laboratories that are equipped with an anechoic or semi-anechoic chamber. For manufacturers of electronic devices, it would be beneficial if a Gigahertz Transversal Electromagn...

2013
Zhang Wei

The switching device turn-on and turn-off process will produce high-frequency electromagnetic interference, based on the finite element method ANSYS software with powerful computing capabilities, has been widely used in complex electromagnetic field calculations. In this paper, ANSYS software to model and analyze the insulated gate bipolar transistor (IGBT) and quantitative distribution of elec...

2016
Yongxin Liu Songjie Luo Jixiong Pu Zenghui Gao

Utilizing the Young’s double slits and Mach-Zehnder interferometer, we proposed an experimental method to measure the generalized Stokes parameters of a radially polarized random electromagnetic beam. After the partially coherent beam propagating through the Young’s double slits, the interference fringe is obtained by the help of a Mach-Zehnder interferometer consisting of apertures, quarter-wa...

Journal: :Magnetic resonance in medicine 2002
Qing X Yang Jinghua Wang Xiaoliang Zhang Christopher M Collins Michael B Smith Haiying Liu Xiao-Hong Zhu J Thomas Vaughan Kamil Ugurbil Wei Chen

Radiofrequency (RF) field wave behavior and associated nonuniform image intensity at high magnetic field strengths are examined experimentally and numerically. The RF field produced by a 10-cm-diameter surface coil at 300 MHz is evaluated in a 16-cm-diameter spherical phantom with variable salinity, and in the human head. Temporal progression of the RF field indicates that the standing wave and...

Journal: :Applied Physics Letters 2006

Journal: :Advanced Engineering Materials 2022

This review aims to consolidate scattered literature on thermally sprayed coatings with nonionizing electromagnetic (EM) wave absorption and shielding over specific wavelengths potentially useful in diverse applications (e.g., microwave millimeter wave, solar selective, photocatalytic, interference shielding, thermal barrier-heat/emissivity). Materials EM properties such as electric permittivit...

بخشی گرمی, فریال, بروستانی, جمال,

In this paper we studied the focusing effect of electromagnetic wave in the two-dimensional graded photonic crystal consisting of Silicon rods in the air background with gradually varying lattice constant. The results showed that graded photonic crystal can focus wide beams on a narrow area at frequencies near the lower edge of the band gap, where equal frequency contours are not concave. For c...

Journal: :Journal of physics 2023

Abstract In the process of cable transmission, existence air gap, tip, burr and other conditions will cause partial discharge phenomenon lead to insulation aging, which can affect safety power transmission. Partial detection detect early defects accurately, timely efficiently. It is an ideal method occurrence PD by ultrasonic wave by-product because it less affected electromagnetic interference...

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