High-Q Tunable Filters for Wireless Systems

在可重构系统中，需要高性能的射频（RF）可调谐滤波器，以促进有效利用可用频谱。 新兴的无线系统被设计为支持多个频带，需要为每个频带使用单独的滤波器。 可调谐滤波器的可用性将允许通过仅一个可调谐滤波器来替换大量滤波器，该可调谐滤波器可以被调谐到期望的频带。这将转化为无线基站的显著尺寸和成本降低。此外，它将允许运营商动态管理硬件资源，以适应多标准要求和网络流量。 本研究计划的目的是将微机电系统（MEMS）技术与高Q值的三维谐振器结构相结合，研制射频可调谐滤波器。MEMS技术在尺寸、插入损耗和线性度方面上级任何其他已知的调谐技术。该研究计划提出引入一类新的可调概念，这将允许实现可调滤波器，可以满足无线系统的严格要求。 工业合作伙伴华为在渥太华和多伦多设有分部。它是世界上最大的无线基站子系统供应商之一。该项目将有助于培养几名研究生和博士后研究员在射频工程和快速新兴的MEMS技术领域。

High performance radio frequency (RF) tunable filters are needed in reconfigurable systems to facilitate efficient utilization of the available frequency spectrum. Emerging wireless systems are designed to support several frequency bands, requiring the use of an individual filter for each frequency band. The availability of tunable filters will allow the replacement of a large number of filters by just one tunable filter which can be tuned to desired frequency band. This will translate to significant size and cost reduction of wireless base stations. In addition, it will allow operators to manage dynamically the hardware resources to accommodate multi-standards requirements and network traffic. The objective of this research project is to develop RF tunable filters by integrating the micro-electro-mechanical systems (MEMS) technology with high-Q three dimensional resonator structures. The MEMS technology is superior to any other known tuning technology in terms of size, insertion loss and linearity. This research program proposes to introduce a new class of tunable concepts that would allow the realization of tunable filters that can meet the stringent requirements of wireless systems. The industrial partner, Huawei, has divisions in Ottawa and Toronto. It is one the world's largest suppliers of subsystems for wireless base stations. The project will help to train several graduate students and post-doctoral fellows in RF engineering and in the fast emerging field of MEMS technology.