Optimising slanted-finger interdigital transducer (SFIT) filters
Optimising slanted-finger interdigital transducer (SFIT) filters
复制标题
优化斜指叉指传感器 (SFIT) 滤波器
DOI：
10.1109/ultsym.2001.991566
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
B. Steiner
中科院分区：
文献类型：
--
作者：
B. Steiner
本文提出了一种通过优化某些参数来实现斜指叉指换能器(SFIT)滤波器性能最大化的创新设计方法。这将导致改进的性能，因为例如，机械反射将不仅用于使SFIT滤光器的IDT单向，而且还用于改善滤光器的响应。例如，可以防止由三重传输回波引起的通带波动问题。此外，可以在不增加指状组的数量的情况下增加裙子的陡度。此外，还可以减小芯片的尺寸。将该方法与传统的设计方法进行了比较。仿真和实验结果表明，该优化方法具有较好的性能。已经开发了一种快速分析，这是优化所必需的。文中还给出了基于标度原理确定所有P-矩阵元素的方法。
This paper presents an innovative design method for achieving a maximum performance in slanted-finger interdigital transducer (SFIT) filters by optimising certain parameters. This will lead to an improved performance as for example the mechanical reflections will not be only utilised to make the IDTs of the SFIT filter unidirectional but also to improve the filter response. For instance, passband ripple problems caused by triple transit echo may be prevented. Moreover, the skirt steepness may be increased without increasing the number of finger groups. In addition, the chip size can be reduced. This method will be compared with conventional design methods. Simulated and experimental results of some filter examples help to show the performance that can be achieved by this optimisation method. A fast analysis, which is necessary for optimising, has been developed. The method, which is based on a scaling principle to determine all P-matrix elements, is also described.