双模声表面波谐振型滤波器的研究

Research of the Coupling SAW Resonator Filter with Double- Mode

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。

There are wide purpose to all kinds of SAW transducer for mobile communication device. Especially, it is comprehensive at- tention to double- mode coupling resonator filter because of low loss and narrow passband .Equivalent circuit of coupling SAW res- onator 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.