High frequency techniques at UHF and above

UHF 及以上高频技术

• 批准号: 46227-2009
• 负责人: Paknys, Robert
• 金额: $ 2.11万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=568941
• 关键词: frequency; techniques; UHF; above

"High Frequency Techniques at UHF and Above" broadly refers to techniques that can be used to mathematically describe electromagnetic waves at ultra-high frequencies in terms of rays. The proposed research will develop mathematical models that can be applied to practical problems described below. The aircraft industry is interested in low-profile "conformal antennas" that conform to the curved outer surface of the aircraft. Our recent research on "leaky waves" has led us to an understanding of what might happen to a leaky-wave antenna if the flat structure gets curved. We will explore the possibilities of designing curved leaky wave antennas. As a ray passes through a complicated bulding material such as reinforced concrete, it is difficult to predict its strength. We are developing a model for this situation. The results will be useful for the planning of indoor wireless networks. With support from the Department of National Defence, Ottawa we developed a computer code that uses high frequency techniques to predict the radar signature of naval vessels, aircraft, and other targets of interest. In the course of that work we have identified some theoretical limitations that need to be addressed. In particular, the effects of sharp corners and edges on a target are difficult to model, and this will require further basic research.

“ UHF及以上的高频技术”广泛地指的是可用于数学上描述超高频率电磁波的技术。拟议的研究将开发数学模型，可应用于下面描述的实际问题。 飞机行业对符合飞机弯曲的外表面的低调“共同天线”感兴趣。我们最近对“泄漏波”的研究使我们了解了如果扁平结构弯曲，漏水天线可能会发生什么。我们将探索设计弯曲的漏水天线的可能性。 当射线穿过复杂的大块材料（例如钢筋混凝土）时，很难预测其强度。我们正在为这种情况开发一个模型。结果对于计划室内无线网络将很有用。 在国防部的支持下，渥太华我们开发了一项计算机代码，该计算机使用高频技术来预测海军船只，飞机和其他感兴趣的目标的雷达签名。在这项工作的过程中，我们确定了一些需要解决的理论局限性。尤其， 尖锐的角和边缘对目标的影响很难建模，这将需要进一步的基础研究。