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関連する概念動画

The Maximum Power Transfer Theorem01:20

The Maximum Power Transfer Theorem

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Consider a linear AC Thevenin equivalent circuit connected to a load impedance.
The load connected draws the current, and the circuit delivers the power to the load. The alternating current flowing through the load is determined using the rectangular form of voltages, currents, network impedance, and load impedance. The average power delivered to the load is obtained from the product of the square of current and load resistance.
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Maximum Power Transfer01:16

Maximum Power Transfer

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Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
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Superconductor01:24

Superconductor

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A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
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Design Example01:23

Design Example

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The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
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A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
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Transmission Line Design Considerations01:23

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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...
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関連する実験動画

Updated: Jan 13, 2026

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
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トポロジカル半超モードによって実現される超頑健な電気通信

Rui Zhou1,2, Xintong Shi1, Hai Lin1

  • 1College of Physical Science and Technology, Central China Normal University, Wuhan, Hubei, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|January 10, 2026
PubMed
まとめ
この要約は機械生成です。

トポロジカルフォトニクスは、頑健な集積導波路デバイスを可能にします。新しいバレーリッジギャップ導波路は、後方散乱耐性を備えた超小型でシームレスに統合されたデバイスを実現します。

キーワード:
シームレス統合超頑健な電気通信トポロジカル半超モード超小型バレーリッジハイブリッド導波路

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関連する実験動画

Last Updated: Jan 13, 2026

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科学分野:

  • フォトニクス
  • 物性物理学
  • 集積光学

背景:

  • トポロジカルフォトニクスは、後方散乱耐性により頑健な集積導波路デバイスを提供します。
  • 統合の課題には、モード対称性の不一致や大きなデバイス寸法が含まれます。

研究 の 目的:

  • トポロジカルフォトニクスの統合課題を克服すること。
  • 超小型でシームレスに統合されたトポロジカル導波路デバイスを開発すること。

主な方法:

  • トポロジカル半超モードエンジニアリングに基づく新しいバレーリッジギャップ導波路を導入しました。
  • リッジ導波路モードとバレーキンク状態をハイブリダイズして、奇対称超モードを作成しました。
  • 寸法を削減し、放射損失を排除するために、完全電気導体境界を実装しました。

主要な成果:

  • トポロジカル半超モードエンジニアリングにより、頑健な伝搬と超小型動作を実現しました。
  • 直接横電界モード整合により、標準導波路とのシームレスな統合を実証しました。
  • 実験結果は、-15 dB未満の反射損失と、急カーブを通じた頑健な信号伝搬を示しました。

結論:

  • 集積導波路デバイスのためのトポロジカル半超モードの実用的な応用を開拓しました。
  • 後方散乱耐性とサブ波長深さのコンパクトさを組み合わせた新しいクラスの導波路を確立しました。
  • トポロジカルフォトニック統合のためのモード対称性の不一致とデバイス寸法の重要な課題を克服しました。