基于MBVD模型的FBAR滤波器的仿真与研究

Simulation and Research of FBAR Filter Based on MBVD Model

从MBVD等效电路模型出发,研究了三种不同级联方式下FBAR滤波器的滤波效果,同时选取了其中滤波效果更好、应用更为广泛的梯形结构,进一步分析不同级联阶数下梯形结构FBAR滤波器的带内插入损耗与带外抑制的变化趋势,并通过仿真分析设计得出符合5G通信频段(3.4-3.6GHz)标准的中心频率为3.5GHz,带宽为100 MHz的五阶梯形结构FBAR滤波器。

Based on the MBVD equivalent circuit model,the filtering effects of FBAR filters in three different cascade modes are studied.At the same time,the ladder structure with better filtering effect and wider application is selected,and the variation trend of in-band insertion loss and out-of-band rejection of FBAR filter under different cascade orders is further analyzed.Through the simulation analysis design,a six-stepped FBAR filter with a center frequency of 3.5 GHz and a bandwidth of 100 MHz conforming to the 5 G communication band(3.4-3.6 GHz)is obtained.