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研究比较了几种陷阱型双通带声表面波滤波器的设计方法.实验表明,采用组合式均匀叉指换能器及变形多条耦合器元件可有效提高对陷阱频率的抑制.“,”Three methods for design of SAW filter with two pass bands and a trap are presented. The experiments show that suppress at trap frequency can be effectively improved by using composed uniform IDT and modified MSC.