双通道RSPUDT声表面波滤波器优化设计  

Optimization Design Techniques for Two Track RSPUDT Structure SAW Filters

作　　者：姚远[1] 蒋道军[1] 陈婷婷[1] 罗丹[1] 陈小兵[1] 

机构地区：[1]四川压电与声光技术研究所,重庆400060

出　　处：《压电与声光》2010年第2期169-171,174,共4页Piezoelectrics & Acoustooptics

摘　　要：介绍了一种利用分布声反射换能器(DART)结构的双通道谐振单相单向换能器(RSPUDT)滤波器的设计方法。滤波器中2个通道的4个换能器结构完全不同,分别对它们进行优化设计,使结构具有更大的自由度,因而获得更好的性能。在与单通道RSPUDT滤波器相同指标下,双通道结构可实现小的长度和体积。采用随机优化算法找到换能函数和反射函数的全局最优解,从而避免了结构收敛到局部最小点。实验分析表明,模拟结果和实验结果相吻合。We presents a general design method of two tracks RSPUDT filters using DART structure. The structures of four IDTs in two tracks are different. Optimization algorithm is implemented respectively in the struc- ture, which makes the design more flexible. Better performance is obtained though proper design. Comparison of the single track with two tracks RSPUDT filters shows that the latter have advantages of smaller length and volume. Stochastic optimization algorithm is used to search the global solution of transduction and reflection function, which avoids the local minimum. Experimental results show good agreement with the simulation results.

关 键 词：双通道 谐振单相单向换能器(RSPUDT) 滤波器 优化设计 

分 类 号：TN65[电子电信—电路与系统]