Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Standing Electromagnetic Waves01:15

Standing Electromagnetic Waves

1.5K
Electromagnetic waves can be reflected; the surface of a conductor or a dielectric can act as a reflector. As electric and magnetic fields obey the superposition principle, so do electromagnetic waves. The superposition of an incident wave and a reflected electromagnetic wave produces a standing wave analogous to the standing waves created on a stretched string.
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...
1.5K
Dual Nature of Electromagnetic (EM) Radiation01:10

Dual Nature of Electromagnetic (EM) Radiation

2.0K
Electromagnetic (EM) radiation consists of electric and magnetic field components oscillating in planes perpendicular to each other and mutually perpendicular to radiation propagation through space. EM radiation can be classified as a wave, characterized by the properties of waves such as wavelength (denoted as λ) and frequency (represented by ν).
Wavelength is the distance between two consecutive peaks (the highest point) or troughs (the lowest point) in the wave. Frequency is the...
2.0K
Electromagnetic Waves01:30

Electromagnetic Waves

8.6K
James Clerk Maxwell formulated a single theory combining all the electric and magnetic effects scientists knew during that time, calling the phenomena his theory predicted “Electromagnetic waves”. He brought together all the work that had been done by brilliant physicists such as Oersted, Coulomb, Gauss, and Faraday and added his own insights to develop the overarching theory of electromagnetism. Maxwell’s equations, combined with the Lorentz force law, encompass all the laws...
8.6K
Electromagnetic Fields01:30

Electromagnetic Fields

2.1K
Electric fields generated by static charges, often referred to as electrostatic fields, are characteristically different from electric fields created by time-varying magnetic fields. While the former is a conservative field, implying that no net work is done on a test charge if it goes around in a complete loop in the field, the latter is, by definition, not a conservative field; net work is done, and it is proportional to the rate of change of magnetic flux.
However, the observation of...
2.1K
Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

2.9K
The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
2.9K
Propagation Speed of Electromagnetic Waves01:30

Propagation Speed of Electromagnetic Waves

3.4K
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
3.4K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Room-Temperature Tuning and Probing of Fermi Polarons in Atomically Thin Semiconductors on a Plasmonic Metasurface.

ACS nano·2026
Same author

A Spectral Reflectance Model of Smooth Dry Soil Surfaces for Varied Soil Properties Based on Intelligent Learning.

Sensors (Basel, Switzerland)·2026
Same author

Generation of MIF Peptides via Solid Phase Peptide Synthesis.

Methods in molecular biology (Clifton, N.J.)·2026
Same author

MRI-Based Synovial Iron Quantification Associates with Bone Erosion in Rheumatoid Arthritis.

Biomedicines·2026
Same author

Iron overload reprogramming lipid metabolism through the IRP1-SCAP axis in fibroblast-like synoviocytes aggravates bone destruction in rheumatoid arthritis.

Experimental & molecular medicine·2026
Same author

Phase-Boundary-Mediated Nonvolatile Switching of Polar Vortices in Ferroelectric Superlattices.

Nano letters·2026

相关实验视频

Updated: Jun 25, 2025

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
13:44

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

15.3K

多带通向隐形斗 多带通向隐形斗

Xiaojun Hu1, Yu Luo2, Jie Wang3

  • 1Laboratory of Applied Research on Electromagnetics, Zhejiang University, Hangzhou, 310027, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|May 21, 2024
PubMed
概括

研究人员开发了转换光学 (TO) 设备的新设计,创造了一个在多个频率上工作的隐形斗. 这一突破克服了以前的蒙蔽的狭窄带宽限制,使实际应用成为可能.

关键词:
费布里 - 佩罗特共振多频段的多频段服务.不磁性的非磁性物质.全方位隐形斗遮蔽器

更多相关视频

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
08:48

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Published on: September 25, 2020

5.7K
Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging
04:54

Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging

Published on: June 16, 2023

2.9K

相关实验视频

Last Updated: Jun 25, 2025

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
13:44

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

15.3K
Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
08:48

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Published on: September 25, 2020

5.7K
Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging
04:54

Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging

Published on: June 16, 2023

2.9K

科学领域:

  • 物理 物理学 物理
  • 材料科学 材料科学 材料科学
  • 电磁主义 电磁主义

背景情况:

  • 转换光学 (TO) 允许对电磁波进行操纵,用于诸如隐形斗之类的应用.
  • 目前的隐形斗带宽狭窄,限制了实际使用.
  • 多带操作对于推进TO设备至关重要.

研究的目的:

  • 为多带异性异性金属材料提出一个一般的设计策略.
  • 实验性地实施一个具有多带功能的全向隐形斗.
  • 为了克服现有的TO设备的单频限制.

主要方法:

  • 设计了具有无限和空间梯度允许性组件的异性质超材料.
  • 利用转换光学原理将超材料结合用于斗制造.
  • 进行远场模拟和近场实验映射进行验证.

主要成果:

  • 成功实施了一种全方位的隐形斗.
  • 在多个频率上实现阻抗匹配自由空间.
  • 在5和10 GHz的频率下,证明了对多个大型物体的同时散射抑制.

结论:

  • 拟议的设计策略使多频带异性异性金属材料成为可能.
  • 多带隐形斗的实验实现是一个重要的进步.
  • 这项工作使实际的多带转换光学设备更接近现实.