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

电磁超表面（emms）包括广泛的人工工程结构，可以实现对电磁波的非凡操纵。应用于微波和毫米波频率范围内的无线电波，这些表面的能力可以用来实现广泛应用的天线和传感设备的新功能和能力，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，这些架构和设计在推进下一代无线和传感系统的能力方面显示出巨大的希望，包括反射射线、发射阵列、频率选择表面、阻抗表面和超表面/超聚合。****** emms的精确设计取决于其特性和散射行为的准确表征。这些特性的测量需要极其精确的实验设置，特别是当设备迁移到许多新兴无线系统（如卫星和5G）的目标更高频段时。该提案描述了两组组件，这将大大增强我们对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，这将允许用于表征emms的基本量（例如表面极化率）精确测量至60 GHz。第二组组件将增加现有近场扫描系统的能力，提高其测量4-60 GHz大型emms的精度。这些包括校准喇叭和机械部件，使这成为可能。这两组要求的组件都将利用在各自设施中已经进行的主要投资。******提议的设备对于支持由申请人管理的许多研究项目的实验工作至关重要，其中许多与工业接口。因此，这些设备将在为工业赞助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，物理演示是确保公司持续购买的关键货币，因为我们在开发新兴技术方面与他们一起通过了各种技术准备门槛。重要的是，学员不仅可以获得使用最先进设备的实际技能，而且还可以参与与工业伙伴的实际项目，这将大大提高高素质人才加入劳动力队伍的准备，无论是在工业还是学术界。总的来说，拟议的设备将对多伦多大学EMMS领域的一系列正在进行的活动产生深远的研究影响

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.**