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相关概念视频

Mesh Analysis for AC Circuits01:12

Mesh Analysis for AC Circuits

654
In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
654
Parallel Resonance01:23

Parallel Resonance

500
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
500
Transmission Line Design Considerations01:23

Transmission Line Design Considerations

583
Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
583

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相关实验视频

Updated: Jan 10, 2026

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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接地L形角拥抱补丁阵列偏振转换元表面与多带和宽带特征兼容

Shi Kong1,2, Yifei Zhang1,2, Ziheng Fu3

  • 1China Airborne Missile Academy, Luoyang 471009, China.

Micromachines
|November 27, 2025
PubMed
概括

这项研究引入了一种新型的超表面,可以有效地在多个频段和超宽频谱中旋转线性极化. 这一突破有利于先进的雷达和无线通信系统.

关键词:
宽带宽带是什么意思metasurface 地表的表面是什么多频段的多频段两极分化转换转换的变化

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Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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相关实验视频

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13:44

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Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
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科学领域:

  • 电磁学和元材料的使用
  • 应用物理 应用物理
  • 电气工程 电气工程

背景情况:

  • 超表面具有独特的电磁性质.
  • 高效的极化控制对于先进的通信和雷达系统至关重要.
  • 实现多带和宽带两种极化旋转都是一项重大挑战.

研究的目的:

  • 设计和验证一个线性偏振旋转器的 metasurface.
  • 为了在多个频段中实现高极化转换比率.
  • 为了证明超宽带极化转换能力.

主要方法:

  • 一个接地阵列的L形角拥抱补丁被提出.
  • 进行了电磁模拟来分析性能.
  • 进行实验验证,以确认模拟结果.

主要成果:

  • 超表面在四个不同的频段 (5.7-6.2,7.0-8.7,11.2-13.9和16.7-18.0 GHz) 中实现了>90%的极化转换比率.
  • 在四个共振点观察到接近单位的转换效率.
  • 在超宽频域 (5.5-18.1 GHz) 上证明了有效的偏振转换.

结论:

  • 拟议的超表面表现出有价值的多带和宽带极化旋转特征.
  • 这种设计适用于复杂的电磁环境.
  • 潜在的应用包括多功能雷达和超宽带无线通信系统.