相关实验视频
Updated: Jun 16, 2026

11:57
Fabricating Metamaterials Using the Fiber Drawing Method
Published on: October 18, 2012
13.9K
概括
这项研究介绍了一种灵感来自于原创的超材料,它既可以充当吸收器,也可以充当偏振转换器. 这种可适应的超材料为先进的应用提供可调节的电磁特性.
科学领域:
- 材料科学 材料科学 材料科学
- 电磁主义 电磁主义
- 超材料是指一种超材料.
背景情况:
- 原木原理越来越多地应用于材料设计.
- 超材料具有独特的电磁性质.
- 可调节的电磁设备对于现代技术至关重要.
研究的目的:
- 提出一种灵感来自于原创的多功能元材料.
- 为了实现吸收和线性循环极化转换 (LCPC) 功能之间的转换.
- 使用高阻抗表面来增强吸收带宽.
主要方法:
- 基于原木结构设计一个超材料.
- 机械拉伸或压缩元材料以切换功能.
- 使用高阻抗表面来提高吸收.
- 在千兆赫兹 (GHz) 范围内分析性能.
主要成果:
- 超材料作为吸收器,在17.20-1985 GHz (14.8%的相对带宽) 范围内的吸收率超过0.9.
- 作为LCPC,它在14.77-18.35 GHz (21.6%的相对带宽) 范围内运行,轴向比率<3dB.
- 原木的特性在LCPC操作期间减轻了效应.
结论:
- 提出的灵感来自于原木的超材料是一个多功能设备.
- 机械调允许多功能电磁应用.
- 该设计显示了通信和电磁隐形的前景.
相关概念视频
Bending of Members Made of Several Materials
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
Half wave rectifier
A half-wave rectifier is a fundamental circuit in electronics, designed to convert alternating current (AC) voltage into a unidirectional voltage. It utilizes the simplest form of diode rectification, where the circuit comprises a single diode in series with a load resistor and an AC power source.
Full wave rectifier
A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.
Bridge rectifier
The bridge rectifier is essential in electronics for efficiently converting alternating current (AC) to direct current (DC). Comprised of four diodes configured in a bridge layout, this rectifier effectively processes both the positive and negative halves of the AC waveform, making it superior to half-wave and full-wave center-tapped rectifiers in terms of voltage regulation and output stability.
Operationally, the bridge rectifier allows current flow through two of its diodes during each...
Operationally, the bridge rectifier allows current flow through two of its diodes during each...
Introduction to Wood
Wood, derived from trees, is a versatile and widely used construction material. Trees feature a trunk surrounded by a protective layer of dead bark. Beneath this outer layer lies the living bark, followed by the cambium, and then the sapwood which transitions into heartwood as it matures. At the center of the trunk is the pith. The age of a tree can be discerned by examining its growth rings, which are concentric bands visible in the trunk's cross-section.
The structural integrity of the wood...
The structural integrity of the wood...
Wood Products
Wood products encompass a broad range of materials crafted from wood strands, veneers, lumber, and even waste wood-like shreds, designed for both structural and nonstructural purposes. Various specialized wood products have been developed to enhance strength, durability, and versatility in building applications.
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...

