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相关概念视频

Aliasing01:18

Aliasing

130
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
130
Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

352
Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
352
Design Example01:23

Design Example

325
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...
325
IR Frequency Region: Fingerprint Region01:03

IR Frequency Region: Fingerprint Region

866
IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
866
IR Spectrometers01:25

IR Spectrometers

1.1K
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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相关实验视频

Updated: Jun 25, 2025

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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太赫兹通信:检测和信号处理.

Guanxuan Lu1, Jiaqi Wang1, Rui Zhou1

  • 1Advanced Micro-/Nano- Devices Lab, Department of Systems Design Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada.

Nanotechnology
|May 20, 2024
PubMed
概括
此摘要是机器生成的。

本文回顾了6G网络的太赫兹探测器,详细介绍了它们的制造和信号处理. 它涵盖了可靠的太赫兹通信系统所必需的降噪技术.

关键词:
6G网络网络的6G网络是非常重要的.信号处理 信号处理 信号处理太赫兹波是一种特拉赫兹波.

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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
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科学领域:

  • 电气工程 电气工程
  • 电磁学 电磁学 电磁学 电磁学
  • 信号处理 信号处理

背景情况:

  • 6G网络的发展正在推动对太赫兹 (THz) 通信的研究.
  • 特拉赫兹波具有独特的特性,如非电离辐射和穿透非金属材料.

研究的目的:

  • 为了提供对太赫兹探测器的全面概述.
  • 总结THz探测器的制造工艺,结构设计和改进策略.
  • 讨论在THz系统中减少噪音的信号处理技术.

主要方法:

  • 对各种太赫兹探测器机制的审查.
  • 制造和结构设计改进的总结.
  • 介绍了降噪方法,如波形变换,UM-MIMO和解码.

主要成果:

  • 一个概述当前的太赫兹探测器技术.
  • 了解如何提高探测器性能和可靠性.
  • 讨论用于实际的太赫兹通信的信号处理技术.

结论:

  • 太赫兹探测器对于未来的6G网络至关重要.
  • 优化制造和信号处理是克服噪音挑战的关键.
  • 这项工作为太赫兹通信系统开发提供了基本的理解.