双模声表面波谐振型滤波器的研究

在移动通信设备中，各类声表面波传感器有广泛的用途，尤其是双模耦合谐振滤波器
能满足低插损、窄通带的要求，受到了广泛的关注。本文给出了双模耦合谐振型滤波器的等效电路，计算出了电路的内部参数，并且对电路模拟仿真，对结果做了误差分析,提出了改进的方法，最后就滤波器的性能进行了相应的讨论。
关键词:声表面波;滤波器;等效电路
Research of the Coupling SAW Resonator Filter with Double-Mode LI Wei, WEI Yi-Qun, ZHU Jia-Lin Department of Information and Communication engineer, Beijing Information Technology Institute Abstract : There are wide purpose to all kinds of SAW transducer for mobile communication device. Especially, it is comprehensive attention to double-mode coupling resonator filter because of low loss and narrow passband .Equivalent circuit of coupling SAW resonator filter with double-mode, inner parameters of circuit and simulation are given in this article, error analysis and amelioration are given synchronously. Finally, some discussions about performance of the filter were given.
Key words: SAW; filter; equivalent circuit