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相关概念视频

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

954
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
954
Propagation Speed of Electromagnetic Waves01:30

Propagation Speed of Electromagnetic Waves

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Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
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相关实验视频

Updated: Jul 15, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Generation and Coherent Control of Pulsed Quantum Frequency Combs

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基于再循环微波光子频率转换的连贯阶段频率波形生成.

Cong Ma, Xiangchuan Wang, Yue Yang

    Optics letters
    |September 29, 2023
    PubMed
    概括

    我们开发了一种新方法,使用微波光子频率转换创建稳定,宽带渐变频率波形. 这种技术确保了高级应用的信号连贯性和稳定性.

    科学领域:

    • 光子学 是一个光子学.
    • 微波工程 微波工程
    • 信号处理 信号处理

    背景情况:

    • 产生连贯和宽带阶段频波形对于各种应用,包括雷达和通信至关重要.
    • 现有的方法经常面临稳定性,连贯性和带宽限制的挑战.

    研究的目的:

    • 提出和演示一种用于生成连贯和宽带渐变频率波形的新方法.
    • 为了利用回流式微波光子频率转换 (MWP-FC) 来改进波形生成.

    主要方法:

    • 使用循环回流式微波光子频率转换 (MWP-FC) 循环与双平行马赫-泽恩德调制器 (DPMZM).
    • 将窄带信号注入MWP-FC循环中,以进行连续的频率转换.
    • 在循环中使用自混合检测来抑制光学相位噪声并确保信号连贯性.

    主要成果:

    • 成功生成了一个步调频率信号,其间隔为2 GHz,带宽为16 GHz.
    • 产生了一个步调频率的声信号,其间隔为3GHz,带宽为15GHz.
    • 通过连贯集成和脱技术验证生成信号的连贯性.

    结论:

    • 拟议的MWP-FC方法有效地产生连贯的宽带渐变频率波形.

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    Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity
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  • 与传统方法相比,该技术提供了更好的稳定性和连贯性.
  • 这种方法对雷达和通信系统中先进的信号生成具有前途.