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相关概念视频

Quadric Surfaces01:28

Quadric Surfaces

Quadric surfaces are three-dimensional surfaces characterized by second-degree equations in the variables x, y, and z. These surfaces are smooth and continuous, and specific combinations of squared and linear terms define their shapes. The main types of quadric surfaces include ellipsoids, cones, paraboloids, and hyperboloids. Each type exhibits distinct geometric features depending on how the variables are arranged and related within the equation.Ellipsoids are closed surfaces formed when all...
Tangent Planes to a Parametric Surface01:22

Tangent Planes to a Parametric Surface

A tangent plane provides a linear approximation to a curved surface at a specific point, capturing the local behavior of the surface. It can be understood as the plane that just touches the surface at that point and is defined by the tangent directions of curves lying on the surface. These tangent directions arise naturally when the surface is described parametrically, allowing systematic construction of the plane.For a surface expressed in parametric form, the position of any point is...

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相关实验视频

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Characterization of Anisotropic Leaky Mode Modulators for Holovideo
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完全平坦的高阶频率选择面具有准圆的响应,使用多式结构的多式结构.

Zhenlin Li, Yin Li, Ruixiang Liao

    Optics express
    |February 20, 2026
    PubMed
    概括

    我们使用多模共振器 (MMR) 开发了一个平面高阶频率选择面 (FSS). 这种新的设计实现了具有高选择性和低配置的准圆带宽响应,显示出出色的过性能.

    科学领域:

    • 电磁学和元材料的使用
    • 微波工程 微波工程
    • 过器的设计设计

    背景情况:

    • 频率选择性表面 (FSS) 对于电磁波过至关重要.
    • 传统的FSS设计往往面临选择性和配置高度的限制.
    • 实现高阶波器响应与急剧滚动仍然是一个设计挑战.

    研究的目的:

    • 提出并演示一个完全平面的高阶FSS,具有准圆的带宽响应.
    • 实现通过带边缘附近的有限频传输零点 (TZs),以提高选择性.
    • 研究使用多模共振器 (MMR) 和合矩阵理论用于先进的过器设计.

    主要方法:

    • 使用共振器-双模式-共振器配置的单元电池的设计.
    • 由合矩阵配方指导的交叉合路径的合成,以实现传输零.
    • 利用合矩阵理论来分析操作机制和预测性能.
    • 一个平面原型的制造和测量.

    主要成果:

    • 实验演示平面高阶FSS的准圆波段响应.
    • 在宽带边缘附近实现了有限频传输零点,提高了选择性.
    • 测量性能显示了四个传输极和两个传输零,与模拟密切匹配.

    更多相关视频

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    Author Spotlight: Unveiling the Potential of VSFG Microscopy in Studying Mesoscopically Heterogeneous Self-Assembled Structures
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  • 获得了11.5%的3dB分数带宽 (FBW),低配置为0.14λ0.0.

    • 结论:

    • 基于MMRs的拟议平面FSS提供具有近圆反应和高选择性的高阶过.
    • 该设计实现了低调和简单,低成本的制造.
    • 合矩阵理论为理解和优化这些高阶FSS设计提供了有效的框架.