Enabling metamaterial solutions for antennas in wireless internet service provision (WISP)

为无线互联网服务提供 (WISP) 中的天线提供超材料解决方案

• 批准号: 516086-2017
• 负责人: Iyer, Ashwin
• 金额: $ 3.5万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=696944
• 关键词: Enabling; metamaterial; solutions; antennas; wireless

In wireless internet service provision (WISP), any efforts to render antennas more compact, low-profile, or multifunctional can bring certain challenges such as increased mutual coupling and complex antenna architectures, all of which variously enlarge antenna footprints, complicate design, and present fabrication challenges. Although solutions exist for these challenges, they may actually increase the size, weight, complexity, and cost of the antenna, and they typically employ ad-hoc or otherwise empirical design methods. A separate challenge is the known effect of radomes on radiation parameters. These structures, whose shapes are dictated by application-specific parameters such as wind resistance and aesthetics, are not typically exploited to enhance antenna properties, although they present an interesting opportunity to do so. The above challenges demand a more robust solution drawing on new paradigms in antenna design. One such paradigm is that of electromagnetic (EM) 'metamaterials' (MTMs), which are periodic structures engineered to create exotic wave-propagation characteristics - often unavailable using natural materials - and which may be further classified into several types. Among these are EM bandgap structures (EBGs) and certain incarnations of frequency-selective surfaces (FSSs), where the former are typically used to tailor propagation in guided-wave applications (e.g. waveguides and TLs) and the latter are typically used to engineer the transmission and reflection response of waves in free space. The proposed collaboration with KP Performance Inc. (Edmonton, AB -- abbreviated KPPA) will investigate designing compact multifunction diversity antennas that incorporate recent advances in MTM-based EBG technology to enable broadband and/or multi-band operation with reduced mutual coupling. A second aspect of this work will examine patterning antenna radomes and ground planes using MTM-based FSSs and EBGs, respectively, to effect better half-power beamwidth roll-off, low side-lobes, and improved front-to-back ratios.

在无线互联网服务提供（WISP）中，任何使天线更紧凑、低轮廓或更小的努力都是可能的。 多功能可能带来某些挑战，例如增加互耦合和复杂的天线 所有这些架构都不同程度地扩大了天线覆盖区，使设计复杂化，并且目前的制造 挑战尽管存在针对这些挑战的解决方案，但它们实际上可能会增加机器人的尺寸、重量， 复杂性和天线的成本，并且它们通常采用ad-hoc或其它经验设计方法。 另一个挑战是雷达罩对辐射参数的已知影响。这些结构的形状 由应用特定的参数例如风阻力和美观性决定，通常不 开发，以提高天线性能，虽然他们提出了一个有趣的机会，这样做。 上述挑战需要在天线设计中借鉴新范例的更稳健的解决方案。一个这样 电磁（EM）“超材料”（MTM）是一种典型的电磁（EM）“超材料”（MTM），它是周期性结构， 创造奇异的波传播特性-通常使用天然材料无法获得-并且可能 进一步分为几种类型。其中包括EM带隙结构（EBG）和某些具体化 频率选择表面（FSS），前者通常用于调整 导波应用（例如波导和TL），后者通常用于设计 波在自由空间中的透射和反射响应。 与KP Performance Inc.的合作（埃德蒙顿，AB -缩写KPPA）将调查 设计紧凑型多功能分集天线，结合最新的MTM基EBG的进展 技术，以实现具有减少的互耦合的宽带和/或多频带操作。的第二方面 这项工作将检查使用基于MTM的FSS和EBG的天线罩和接地平面的图案化， 分别实现更好的半功率束宽滚降、低旁瓣和改善的前后比。