GOALI: Collaborative Research: 3D Printed Graded-Index Magnetodielectric Devices

GOALI：合作研究：3D 打印梯度折射率磁电介质器件

• 批准号: 1611601
• 负责人: Pallavi Dhagat
• 金额: $ 29.51万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-05-15 至 2021-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1611601&HistoricalAwards=false
• 关键词: GOALI; Collaborative; Research; 3D; Printed

Magneto-dielectric devices, such as microwave and radio frequency lenses, are indispensable to communication systems, needed for example, for radar, mobile, cyber security and internet-of-things applications. Similar to glass lenses, which focus light, these devices allow for focusing or otherwise manipulating radio and microwaves. In particular, devices with spatially varying magnetic and dielectric properties offer exciting and innumerate possibilities for electromagnetic wave shaping but remain to be realized due to lack of practical fabrication techniques. Inkjet printing provides a promising approach to manufacturing such devices: inks of different composition (e.g., containing magnetic and dielectric nanoparticles) can be dispensed in varying ratio within the volume of the device to implement the desired spatial gradient in magneto dielectric properties. The goal of this industry university collaboration is to demonstrate devices, fabricated by 3D inkjet printing, with tailor-made spatial variation in magnetic and dielectric properties to achieve wave shaping as needed by a given application. The demonstration will pave the way for advanced devices such as antenna lenses that beam radio or microwave signals only to a specific WiFi enabled machine or within the perimeter of a specific room to mitigate the risk of signal interference or interception. The project will also create a unique educational and professional development opportunity for participating students, who will acquire expertise and industry experience, via internships, in advanced manufacturing, an area of significant economic importance to the U.S. Further, in partnership with a local library, talks aimed at public education in 3D printing technologies will be presented. This collaborative GOALI project seeks to demonstrate the fabrication of microwave and radio frequency magneto-dielectric devices, with specifically designed, spatially varying electric permittivity and magnetic permeability. The project will combine transformation optics techniques for design of electromagnetic media with 3D inkjet printing for digitally directed device fabrication. Graded index microwave lens antennas, with individually customized radiation patterns, will be printed in proof of concept. The devices will be printed in a layer-by-layer sequence with polymerizable inks containing high permeability magnetic and high permittivity dielectric nanoparticles. A key challenge, due to particle loading constraints when jetting inks, will be attaining the requisite range of permeability and permittivity in the printed composite medium. Inks formulated with commercial nanoparticles will be used to conduct a rapid survey of electromagnetic properties possible in the composites. The results of the survey will guide subsequent ink design with custom nanoparticles. The size, dispersion and loading of the nanoparticles in the inks will be optimized for ink-jettability and range of electromagnetic properties achieved in the printed composites.

微波和射频透镜等磁电介质器件对于雷达、移动、网络安全和物联网应用等通信系统不可或缺。与聚焦光的玻璃透镜类似，这些设备可以聚焦或以其他方式操纵无线电和微波。特别是，具有空间变化的磁和介电特性的器件为电磁波整形提供了令人兴奋和无数的可能性，但由于缺乏实用的制造技术，仍有待实现。喷墨印刷为制造此类设备提供了一种有前途的方法：不同成分的墨水（例如，含有磁性和介电纳米颗粒）可以以不同的比例分配在设备的体积内，以实现磁介电特性所需的空间梯度。此次产学合作的目标是展示通过 3D 喷墨打印制造的设备，具有定制的磁和介电特性空间变化，以根据给定应用的需要实现波形整形。该演示将为天线透镜等先进设备铺平道路，这些设备仅将无线电或微波信号发射到支持 WiFi 的特定机器或特定房间的周边范围内，以降低信号干扰或拦截的风险。该项目还将为参与的学生创造独特的教育和专业发展机会，他们将通过实习获得先进制造领域的专业知识和行业经验，先进制造对美国具有重要的经济重要性。此外，还将与当地图书馆合作，举办针对 3D 打印技术公共教育的讲座。该 GOALI 合作项目旨在展示微波和射频磁电介质器件的制造，这些器件具有专门设计的、空间变化的介电常数和磁导率。该项目将把用于电磁介质设计的变换光学技术与用于数字化定向设备制造的 3D 喷墨打印相结合。具有单独定制的辐射模式的分级折射率微波透镜天线将被打印在概念验证中。这些器件将使用含有高磁导率磁性和高介电常数介电纳米颗粒的聚合墨水逐层打印。由于喷射墨水时颗粒负载的限制，一个关键的挑战是在印刷复合介质中获得所需的磁导率和介电常数范围。用商业纳米粒子配制的墨水将用于对复合材料中可能的电磁特性进行快速调查。调查结果将指导后续的定制纳米粒子墨水设计。油墨中纳米颗粒的尺寸、分散度和负载量将针对喷墨性能和印刷复合材料中实现的电磁性能范围进行优化。