概括
这项研究引入了一种新型的三频带双极化频率选择性剃光器 (FSR),用于增强多频带吸收. 拟议的设计整合了损耗层和频率选择面 (FSS) 以实现宽带性能.
科学领域:
- 电磁学 电磁学 电磁学 电磁学
- 超材料是指一种超材料.
- 微波工程 微波工程
背景情况:
- 频率选择性剃光器 (FSR) 对于控制电磁波传输和反射至关重要.
- 在FSR设计中,实现具有广泛运行带宽的多频段吸收仍然是一个重大挑战.
研究的目的:
- 提出和演示一种具有多频段吸收能力的新型三频段双极化频率选择性剃须刀 (FSR).
- 介绍一种设计方法,用于创建具有集成损失结构和频率选择性表面 (FSS) 的先进FSR.
主要方法:
- 一个组合式的损失结构,包括顶部和中间的损失层以及以嵌套配置排列的底部FSS.
- 三重并行电感器和电容器 (PLC) 共振器,集成圆形共振器,复合方形和耶路撒冷槽的集成,以实现在8,10和12 GHz附近的三重传输带.
- 使用不同的损耗层来管理传动窗口以下,之间和上面的吸收带.
主要成果:
- 成功集成了四个吸收带,带宽分数为74%,10%,7%和30%.
- 保持整体三重传输窗口,同时将反射限制带 (S11 < -10 dB) 从3.4-18.4 GHz (138%带宽) 扩大.
- 通过组装和测试30×30单位原型的模拟结果的实验验证.
结论:
- 拟议的组合性损耗结构有效地使三带双极化FSR中的多频段吸收和宽反射抑制成为可能.
- 提出的设计程序为开发具有定制电磁特性的多频段FSR提供了有价值的指南.
相关概念视频
01:26Raman Spectroscopy Instrumentation: Overview
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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
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01:19Mass Analyzers: Common Types
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The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
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