Automatic computer-aided design of SAW filters using slanted finger interdigital transducers
Automatic computer-aided design of SAW filters using slanted finger interdigital transducers
复制标题
使用倾斜手指叉指传感器自动计算机辅助设计 SAW 滤波器
DOI：
10.1109/58.818756
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
K. Yamanouchi
中科院分区：
文献类型：
--
作者：
H. Yatsuda;K. Yamanouchi
本文介绍了一种适用于中频或宽带应用的斜指叉指换能器（SFIT）声表面波（SAW）滤波器的设计方法。与变迹叉指换能器相比，SFIT不能直接表示脉冲响应。介绍了一种基于频域积木块法的自适应滤波器设计方法。实现了SFIT滤波器的计算机辅助自动设计工具。SFIT滤波器的设计可以使用一个撤回加权阻带响应，孔径加权通带幅度响应，和距离加权通带相位响应。此外，使用该工具可以自动设计用于光掩模的SFIT图案。利用该工具，在x切112 y方向的LiTaO/sub 3/衬底上设计了相对带宽为15%的SFIT滤波器。
This paper describes a design procedure for surface acoustic wave (SAW) filters using slanted finger interdigital transducers (SFIT) that are suitable for mid-band or wideband applications. The SFITs cannot represent the impulse response directly, in contrast to apodized IDTs. A design method for SFITs based on a building-block approach in the frequency domain is described. An automatic computer-aided design tool for SFIT filters has been achieved. The SFIT filters can be designed using a withdrawal weighting for stop-band responses, an aperture weighting for pass-band amplitude responses, and a distance weighting for pass-band phase responses. In addition, a SFIT pattern for photo mask can be automatically designed using this tool. Using this tool, an SFIT filter with a relative bandwidth of 15% was designed on an x-cut 112y-direction LiTaO/sub 3/ substrate.