第二类椭圆型声表面波滤波器的设计
作者:
作者单位:

作者简介:

通讯作者:

基金项目:

伦理声明:



Design of Narrow Bandwidth Elliptic type Ⅱ SAW Filters
Author:
Ethical statement:

Affiliation:

Funding:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    梯形滤波器的带宽由基片的机电耦合系数决定,当基片选择后,相对带宽基本固定。该文提出了一种椭圆型声表面波滤波器,在同一基片上特别是压电性强的基片上,可灵活控制滤波器的相对带宽。由于电容比的存在,声表面波谐振器取代椭圆LC滤波器中的谐振单元后,额外的零点和极点出现在通带两侧。引入模拟退火法对各个谐振器的静态电容进行优化,得到了窄带低损耗高矩形度的滤波器。实验证明了该方法的有效性。

    Abstract:

    The passband width obtained in the SAW ladder filter is inherently limited by the electromechanical coupling factor of piezoelectric substrate. A kind of elliptic SAW filter is proposed in this paper. The relative bandwidth of the attainable filter can be controlled flexibly on the same substrate, especially on the strong piezoelectric substrate. Due to the capacitance ratio γ, the additional zero point and pole point are appeared at the two sides of the passband after the resonators in the elliptic LC filter are replaced by SAW resonators. The static capacitor of each resonator are optimized by introducing the simulation annealing, thus the narrow band, low loss filter with high shape factor has been realized. The effect of the design technique is verified by the experiment

    参考文献
    相似文献
    引证文献
引用本文

王华磊,钟慧,石玉,李利平,周林生.第二类椭圆型声表面波滤波器的设计[J].压电与声光,2013,35(6):786-787. WANG Hualei, ZHONG Hui, SHI Yu, LI Liping, ZHOU Linsheng. Design of Narrow Bandwidth Elliptic type Ⅱ SAW Filters[J]. PIEZOELECTRICS AND ACOUSTOOPTICS

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2013-11-26
  • 出版日期: