CAREER: Acoustic Wave Filters for High Frequency Wireless Communication Applications

不断扩大的商业和军事应用挤占了无线通信频段，产生了将频段扩展到更高频率的迫切需求。新发现的高速伪声表面波(HVPSAW)的应用，有可能满足下一代无线通信的高频要求。这项职业计划涉及高频微波声器件的综合研究和教育计划。研究的目标是确定存在高压压声表面波的压电材料和特定取向，并设计、制造和测试原型高压压声表面波过滤器。具体研究任务如下：(I)寻找压电材料和存在高压PSAW的方向；(Ii)表征理论模式传播；(Iii)确定HVPSAW相速度、传播损耗、温度行为、机电耦合和功率流角；(Iv)通过实验验证HVPSAW理论预测的性能；(V)建立HVPSAW叉指换能器(IDT)结构的理论模型并进行实验验证；(V)对整体式HVPSAW滤波器结构进行建模和表征；(Vi)将HVPSAW结构部件整合到HVPSAW滤波器设计中；以及(Vii)制造和测试HVPSAW滤波器原型。教育目标是为从高中到研究生水平的学生提供快速发展的最先进领域的学习体验。学习经验的范围从高中水平的团队项目到研究生水平的论文。总而言之，该项目不仅将为实现下一代无线通信提供必要的研究，还将在一个非常相关的高需求技术领域教育学生，该领域的应用范围从蜂窝电话到高速通信和信号处理系统。

Expanding commercial and military applications crowd the wireless communications frequency band, creating a critical need to expand the band to higher frequencies. The application of newly discovered high velocity pseudo surface acoustic waves (HVPSAWs), has the potential of satisfying the high frequency requirements of the next generation of wireless communications.This CAREER proposal involves an integrated research and education plan for high radio frequency (RF) microwave acoustic devices. The research objective is to identify piezoelectric materials and specific orientations in which HVPSAWs exist, and to design, fabricate, and test prototype HVPSAW filters. Specific research tasks are: (i) search for piezoelectric materials and orientations in which HVPSAWs exist; (ii) characterize theoretical mode propagation; (iii) determine HVPSAW phase velocity, propagation loss, temperature behavior, electromechanical coupling, and power flow angle; (iv) experimentally verify the theoretically predicted HVPSAW properties; develop a theoretical model for the HVPSAW interdigital transducer (IDT) structure, and its experimental verification; (v) model and characterize integral HVPSAW filters structures, such as reflectors, multistrip couplers, guiding structures; (vi) integrate HVPSAW structure components into HVPSAW filter design; and (vii) fabricate and test prototype HVPSAW filters. The educational objective is to provide a learning experience in a fast moving state-of-the-art area to students ranging from high school to graduate level. The learning experience will range from team projects at the high school level to theses at the graduate level. In summary this project will not only provide the necessary research to realize the next generation of wireless communications but also educate students in a very relevant high need technology area which has applications ranging from cellular phones to high speed communication and signal processing systems.