摘要
在比较了现有分析声表面波（ＳＡＷ）叉指换能器（ＩＤＴ）衍射的各种方法后，提出了一种新方法，它直接从产生ＳＡＷ的ＩＤＴ上电荷分布出发，结合波传播特性及压电材料的各向异性，推导出了严格的ＳＡＷ波角谱表达式，再转化为时域脉冲响应，在频域对衍射的影响进行了宽带分析。对实际ＳＡＷ滤波器模拟计算表明，本算法精确简便。
After comparing the existing techniques of diffraction analysis of SAW IDT,this paper presents a new broadband analysis method.Begining with the charge distribution and Green function,this paper derivates the rigorous angular spectrum of wave and impulse response model,the substrate anisotropy and propagation character are included,and the broadband analysis of diffraction in frequency domain is given.The simulation proves that this method is very precise and can be used in design and compensation of high performance wideband SAW filters.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
1997年第3期244-248,共5页
Journal of University of Electronic Science and Technology of China
基金
国家自然科学基金
关键词
声表面波
叉指换能器
衍射
波角谱
滤波器
acoustic surface wave
interdigital tranducers
diffraction
angular spectrum of wave
pulse response
