电磁全合一辐射散射可重新配置的智能地表变换器
Yajie Mu1, Jiaqi Han1, Hao Xue1
1Key Laboratory of High-Speed Circuit Design and EMC of Ministry of Education, School of Electronic Engineering, Xidian University, Xi'an 710071, China.
National science review
|December 17, 2025
概括
本研究介绍了一种全合一的可重新配置的智能表面 (RIS),它集成了辐射和散射模式. 这种新的设计可以为未来的6G无线通信系统提供多功能应用和经济高效的解决方案.
科学领域:
- 电磁工程 电磁工程 电磁工程
- 超材料是指一种超材料.
- 无线通信是一种无线通信.
背景情况:
- 可重新配置的智能表面 (RIS) 具有显著的潜力,但仅限于特定模式 (例如散射).
- 将辐射和散射等多种不同操作模式集成到单个RIS中具有挑战性,阻碍了多场景应用并增加了成本.
- 现有的RIS设计在一个紧的多功能平台内实现按需偏振和相控方面遇到了困难.
研究的目的:
- 为集成,多功能和多场景应用提出一种全新的电磁一体化RIS设计.
- 开发一个灵活的框架来设计辐射散射元原子,并提供按需的极化和相位控制.
- 降低硬件成本和物理尺寸,同时增强未来无线通信的RIS功能.
主要方法:
- 一个元原子设计,集成一个辐射贴片用于极化控制和一个3dB合器与二极管用于模式切换和相位控制.
- 在合器上的加载二极管 (PIN或varactor) 用于1位或连续相调节.
- 在辐射补丁上加入电容器,以定制初始辐射和散射阶段.
主要成果:
- 演示了一种全合一的辐射散射元原子,具有按需的极化和相调制.
- 在单个元原子中实现了集成的振幅控制,相控和可定制的初始相特性.
- 制造了一个[公式:参见文本]辐射散射RIS,验证了其对辐射 (相位数组) 和散射 (非视线通信) 模式的性能.
结论:
- 拟议的框架成功地弥合了电磁辐射散射系统的差距,通过允许任意极化和相调节.
- 这种全合一的RIS设计为多功能功能提供了一个有希望的,具有成本效益的,紧的解决方案.
- 该技术为6G无线通信系统带来了重大进步.
相关概念视频
Dual Nature of Electromagnetic (EM) Radiation
3.6K
Electromagnetic (EM) radiation consists of electric and magnetic field components oscillating in planes perpendicular to each other and mutually perpendicular to radiation propagation through space. EM radiation can be classified as a wave, characterized by the properties of waves such as wavelength (denoted as λ) and frequency (represented by ν).
Wavelength is the distance between two consecutive peaks (the highest point) or troughs (the lowest point) in the wave. Frequency is the number of...
Wavelength is the distance between two consecutive peaks (the highest point) or troughs (the lowest point) in the wave. Frequency is the number of...
3.6K
Interaction of EM Radiation with Matter: Spectroscopy
3.0K
Electromagnetic (EM) radiation can be considered an oscillating electric and magnetic field propagating through a medium that can interact with matter in its path. The electric field in the radiation can interact with electrical charges in the atoms or molecules in the matter. On the other hand, the magnetic field can interact with the magnetic field in the atomic nucleus. The study of the interaction between electromagnetic radiation and matter is termed spectroscopy. Spectroscopy is the study...
3.0K
Generating Electromagnetic Radiations
6.6K
The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
6.6K
Electromagnetic Fields
2.7K
Electric fields generated by static charges, often referred to as electrostatic fields, are characteristically different from electric fields created by time-varying magnetic fields. While the former is a conservative field, implying that no net work is done on a test charge if it goes around in a complete loop in the field, the latter is, by definition, not a conservative field; net work is done, and it is proportional to the rate of change of magnetic flux.
However, the observation of...
However, the observation of...
2.7K
Electromagnetic Waves in Matter
3.8K
Electromagnetic waves can travel in the vacuum as well as in matter. For example light, which is an electromagnetic wave, can travel through air, water, or glass.
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the medium, μ.
Furthermore,...
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the medium, μ.
Furthermore,...
3.8K
Scanning Electron Microscopy
5.3K
A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
Fundamental Principles
Accelerated...
Fundamental Principles
Accelerated...
5.3K


