压电与声光, 2023, 45 (1): 1, 网络出版: 2023-04-07
基于分层级联技术的梯形声表面波滤波器正向设计
Forward Design of Ladder Surface Acoustic Wave Filter Based on Hierarchical Cascading Technique
摘要
针对任意复杂拓扑结构的梯形声表面波(SAW)滤波器的精确快速设计问题, 基于声/电/磁多物理场耦合全波仿真平台, 结合基因遗传优化算法和通用图形处理器(GPGPU)加速技术, 利用有限元分层级联精确模型(HCT)代替COM模型进行SAW滤波器的设计与优化, 计算速度和优化速度与COM模型相当。通过42°Y-X LiTaO3常规SAW滤波器的优化设计与研制, 插入损耗为0.67 dB, 2 dB相对带宽为3.85%, 验证了该方法的有效性和可行性。
Abstract
In view of accurate and fast design of ladder surface acoustic wave(SAW) filter with arbitrary and complex topology, based on acoustic/electrical/magnetic multi-physical field coupling full-wave simulation platform and combined with genetic optimization algorithm and general graphics processor(GPGPU) acceleration technology, the hierarchical cascade exact model(HCT) is used to replace COM model for the design and optimization of SAW filter. The calculation and optimization speed are comparable with that of COM model. The optimized design and development of 42°Y-X LiTaO3 conventional SAW filter with insertion loss of 0.67 dB and 2 dB fractional bandwidth of 3.85% verifies the effectiveness and feasibility the proposed method.
赵雪梅, 郑泽渔, 白涛, 贺贞, 谢晓, 谭瑞, 肖强, 陈正林, 马晋毅. 基于分层级联技术的梯形声表面波滤波器正向设计[J]. 压电与声光, 2023, 45(1): 1. ZHAO Xuemei, ZHENG Zeyu, BAI Tao, HE Zhen, XIE Xiao, TAN Rui, XIAO Qiang, CHEN Zhenglin, MA Jinyi. Forward Design of Ladder Surface Acoustic Wave Filter Based on Hierarchical Cascading Technique[J]. Piezoelectrics & Acoustooptics, 2023, 45(1): 1.
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