Static and dynamic ultra-wideband (UWB) arbitrary pulse shaping using electromagnetic bandgap (EBG) filters

无线世界中最有希望的最新发展之一是转向基于超宽带(UWB)脉冲的通信，这是由于最近采取的措施使世界各地能够未经许可使用所需的频段。拟议的三年项目监督几种新的无源微波结构的开发，这些结构是为新兴的UWB系统的需求量身定做的。这项理论和实验研究将使INRS-EMT和麦吉尔大学的两个大学团队与他们的工业合作伙伴阿波罗微波公司合作，领导加拿大和世界各地的努力，为新兴的超宽带市场开发具有成本效益的高性能解决方案。具体地说，我们的研究旨在解决产生任意形状的UWB脉冲的问题，这对基于UWB的应用的未来发展具有重要意义。我们的方法是基于一种具有电磁带隙(EBG)的新型微波滤波器，这种滤波器易于在各种成熟的微波技术中实现，并提供了前所未有的设计灵活性。研究工作将如下：(I)将开发精确和通用的综合工具来设计定制的面向UWB的无源结构；(Ii)将设计、制造和表征基于同轴线和脊形波导技术中的EBG的简单实用的静态UWB任意脉冲成形滤波器；(Iii)将设计、实现和测试完全可重构的UWB任意脉冲发生器。这将对无线电信、军用雷达、传感网络和生物医学成像等各种UWB候选应用产生巨大影响。我们方法的灵活性和可以实施我们的概念的微波技术的成熟度将产生符合成本效益的、可批量生产的、适合商业化的结构。最后，这一项目产生的新知识以及与这项工作的不同阶段相关的高素质人员的培训，必将有助于提高加拿大在高技术部门的全球竞争力。

One of the most promising recent developments in the wireless world is the move towards ultrawide-band (UWB) pulse-based communication, spurred on by recent steps being taken to enable the unlicensed use of the required frequency band around the world. The proposed three year project oversees the development of several novel passive microwave structures tailored to the needs of emerging UWB systems. This theoretical and experimental research will allow the two university teams from INRS-EMT and McGill Univ., in collaboration with their industrial partner Apollo Microwaves, to lead Canadian and worldwide efforts in developing cost-effective, high-performance solutions for the emerging UWB market. Specifically, our research is directed toward solving the problem of generating UWB pulses WITH ARBITRARILY DEFINED SHAPES, which is of fundamental importance for the future development of UWB-based applications. Our approach is based on a new class of microwave filters featuring electromagnetic bandgaps (EBGs), which are simple to implement in a wide variety of well-established microwave technologies and offer unprecedented design flexibility. Research effort will be directed as follows: (i) Accurate and general synthesis tools will be developed for the design of customized UWB-oriented passive structures; (ii) Simple and practical static UWB arbitrary pulse-shaping filters based on EBGs in coaxial-line and ridge waveguide technologies will be designed, fabricated and characterized; (iii) Fully-reconfigurable UWB arbitrary pulse generators will be designed, implemented and tested. This will have a dramatic impact in such diverse UWB-candidate applications as wireless telecom, military radar, sensing networks and biomedical imaging. The flexibility of our approach and the maturity of the microwave technologies in which our concepts can be implemented will yield cost-efficient, mass-producible structures amenable to commercialization. Finally, the new knowledge generated from this project and the training of highly qualified personnel associated to the different stages of this work will certainly contribute to enhance Canada's global competitiveness in high-technology sectors.