Equipment for Characterization of Microwave and Millimetre-Wave Electromagnetic Metasurfaces and Metagratings

电磁超表面(EMMS)包括一系列人工设计的结构，可以实现对电磁波的非凡操纵。将这些表面应用于微波和毫米波频率范围的无线电波，可以利用这些表面的能力来实现天线和传感设备的新功能和能力，这些天线和传感设备用于广泛的应用，包括卫星通信、5G无线、成像和雷达系统。多伦多大学的研究人员开创了许多独特的EMMS架构和设计，这些架构和设计在提升下一代无线和传感系统的能力方面显示出巨大的前景，包括反射射线、发射阵列、频率选择表面、阻抗表面和元表面/元评级。EMMS的准确设计取决于对其特性和散射行为的准确表征。测量这些特性需要极其精确的实验设置，特别是在设备迁移到许多新兴无线系统(如卫星和5G)瞄准的更高频段的情况下。这份提案描述了两套组件，它们将极大地增强我们对EMMS进行准确表征的能力。第一个组件系统实现了准光学设置的一部分，该设置将允许精确测量用于表征EMMS的基本量(例如，表面极化率)，最高可达60 GHz。第二套组件将增加现有近场扫描系统的能力，该系统将提高其测量4-60 GHz大型EMMS的精度。其中包括校准喇叭和机械部件，以实现这一点。这两套申请的组件都将利用在各自设施中已经进行的重大投资。*建议的设备对于支持由申请者管理的众多研究项目的实验工作至关重要，其中许多项目与工业相连接。因此，这些设备将在为工业赞助的项目提供有用的实验基础设施方面发挥关键作用，在这些项目中，实物演示是确保企业继续买入的关键货币，因为我们与它们一起通过了开发新兴技术的各种技术准备门。重要的是，学员不仅在使用最先进的设备方面获得实用技能，而且还参与到与工业合作伙伴的实际项目中，这将极大地提高高素质人员加入劳动力大军的准备，无论是在工业还是学术界，这方面的培训潜力很大。总的来说，拟议的设备将使多伦多大学EMMS领域正在进行的广泛活动产生深刻的研究影响。**

Electromagnetic metasurfaces (EMMSs) encompass a wide range of artificially-engineered structures that can achieve extraordinary manipulation of electromagnetic waves. Applied to radio waves in the microwave and millimetre-wave frequency range, the capabilities of these surfaces can be harnessed to realize new functions and capabilities in antennas and sensing devices used in a wide array of applications including satellite communication, 5G wireless, imaging, and RADAR systems. Researchers at the University of Toronto have pioneered a number of unique EMMS architectures and designs that show significant promise in advancing the capabilities of next-generation wireless and sensing systems, including reflectarrays, transmitarrays, frequency-selective surfaces, impedance surfaces, and metasurfaces/metagratings.******The accurate design of EMMSs depends on accurate characterization of their properties and scattering behaviour. Measurements of these properties require extremely accurate experimental setups, especially as devices migrate to higher frequency bands that many emerging wireless systems, such as satellite and 5G, target. This proposal describes two sets of components that will greatly enhance our capability to carry out accurate characterization of EMMSs. The first system of components implement part of a quasi-optical setup that will allow the fundamental quantities used to characterize EMMSs (e.g. surface polarizabilities) to be accurately measured up to 60 GHz. The second set of components will add to the capabilities of an existing near-field scanning system that will increase its accuracy for measuring large EMMSs from 4-60 GHz. These include calibration horns and mechanical components to make this possible. Both sets of requested components will leverage major investments already made in each respective facility.******The proposed equipment is vital to supporting the experimental efforts of numerous research programs managed by the applicants, many of which interface with industry. As such, the equipment will play a pivotal role in providing useful experimental infrastructure for industrially-sponsored projects, in which physical demonstrations are a key currency in securing continued buy-in from companies as we pass various technology readiness gates with them in developing emerging technology. Importantly, there is substantial training potential for trainees in not only gaining practical skills in the use of state-of-the-art equipment, but also engagement in practical projects with industrial partners that will greatly improve the readiness of highly qualified personnel to join the workforce, be it in industry or academia. Collectively, the proposed equipment will enable deep research impact in a breadth of ongoing activities in the EMMS field at the University of Toronto.**