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.

磁性磁电器设备（例如微波炉和射频镜头）对于通信系统来说是必不可少的，例如，对于雷达，移动，网络安全和图像互联网应用程序所需。类似于聚焦光线的玻璃镜头，这些设备允许聚焦或以其他方式操纵无线电和微波炉。特别是，具有空间变化的磁性和电介质特性的设备为电磁波塑造提供了令人兴奋而巨大的可能性，但由于缺乏实用的制造技术，但仍有待实现。喷墨印刷提供了一种制造此类设备的有前途的方法：可以在设备的体积内以不同的比例来分配不同组合物（例如，含有磁性和介电纳米颗粒）的墨水，以在磁电介电特性中实现所需的空间梯度。该行业大学合作的目的是展示由3D喷墨打印制造的设备，并具有量身定制的磁性和介电特性空间变化，以根据给定的应用按需要实现波形。演示将为高级设备（例如，启用特定的WiFi机器或特定房间的周长内的电台发出信号的天线镜片）铺平道路，以减轻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，高级制造业获得专业知识和行业经验，这是对美国的重要经济重要性，与当地图书馆合作，旨在在3D打印技术中进行公共教育。这个协作的守门员项目旨在证明微波和射频磁电磁性设备的制造，并具有专门设计的空间介电常数和磁渗透性。该项目将结合用于设计电磁介质设计的转换光学技术与3D喷墨打印，用于数字定向设备制造。具有单独定制辐射模式的分级索引微波镜头天线将以概念证明。这些设备将用含有高通透性磁性和高介电常数介电纳米颗粒的可聚合油墨的逐层序列打印。由于喷射油墨时的粒子加载约束，一个关键的挑战将是在印刷复合介质中获得必要的渗透性和介电性范围。用商业纳米颗粒配制的油墨将用于对复合材料中可能的电磁特性进行快速调查。调查的结果将使用自定义纳米颗粒指导随后的墨水设计。墨水中纳米颗粒的大小，分散和加载将被优化，以针对印刷复合材料中实现的电墨性和电磁特性范围进行优化。