[1]李普,杨华,孙庆鸿.微机械滤波器3 dB通带特性参数新计算模型[J].东南大学学报(自然科学版),2006,36(4):526-530.[doi:10.3969/j.issn.1001-0505.2006.04.007]
 Li Pu,Yang Hua,Sun Qinghong.New analytical model for 3 dB bandwidth of MEM filter[J].Journal of Southeast University (Natural Science Edition),2006,36(4):526-530.[doi:10.3969/j.issn.1001-0505.2006.04.007]
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微机械滤波器3 dB通带特性参数新计算模型()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
36
期数:
2006年第4期
页码:
526-530
栏目:
数学、物理学、力学
出版日期:
2006-07-20

文章信息/Info

Title:
New analytical model for 3 dB bandwidth of MEM filter
作者:
李普 杨华 孙庆鸿
东南大学机械工程学院, 南京 210096
Author(s):
Li Pu Yang Hua Sun Qinghong
College of Mechanical Engineering, Southeast University, Nanjing 210096, China
关键词:
MEMS 微机械滤波器 3 dB带宽
Keywords:
microelectromechanical systems microelectromechanical system filters 3 dB bandwidth
分类号:
O357;TN703
DOI:
10.3969/j.issn.1001-0505.2006.04.007
摘要:
以含2个振子的微机械滤波器为对象,提出了一组3 dB截止频率、3 dB带宽和通带波纹度计算模型.首先,考虑到微机械滤波器的阻尼很小,在振动方程的基础上推导出了通带波纹度近似计算模型.然后,将微机械滤波器的幅频响应函数在2个固有频率处做Taylor二阶展开,再考虑到幅频响应函数的一阶导数在2个固有频率处近似为零,推导出了3 dB截止频率及3 dB带宽近似计算模型.最后,用计算实例证明了这些近似计算模型的精确性.
Abstract:
A set of new analytical models for 3 dB cutoff frequency, 3 dB bandwidth and ripple of a series two-resonator microelectromechanical system(MEM)filter is presented. Seeing that the damping of the MEM filter is very small, a new analytical model for the ripple of the MEM filter is derived firstly. Then the magnitude response function of the MEM filter is expended in two-order Taylor series around two natural frequencies respectively. The new analytical models for 3 dB cutoff frequency, 3 dB bandwidth are derived based on the fact that the first derivative of the magnitude response function is near zero at the two natural frequencies. The set of new models is validated by comparing its results with the results from conventional method.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目: 国家自然科学基金资助项目(50305002)、东南大学优秀青年教师教学科研资助计划资助.
作者简介: 李普(1971—),男,博士,副教授,seulp@seu.edu.cn.
更新日期/Last Update: 2006-07-20