Frequency characteristic optimization in surface acoustic wave filters by DFP approaches

被引：1

作者：

Park, KC ^{[1
]}

Kagawa, Y ^{[1
]}

Tsuchiya, T ^{[1
]}

Wakatuki, N ^{[1
]}

机构：

[1] Okayama Univ, Grad Sch Nat Sci & Technol, Okayama 7008570, Japan

来源：

INVERSE PROBLEMS IN ENGINEERING MECHANICS | 1998年

关键词：

surface acoustic wave filter; interdigital transducer; delta function model; equivalent circuit model; Davidon-Fletcher-Powell method;

D O I：

10.1016/B978-008043319-6/50059-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Transmission characteristic of surface acoustic wave (SAW) filters is considered. The apodization in the input interdigital transducer (IDT) is adopted to achieve the desired frequency bandwidth and the attenuation for the central frequency of the stopband given. In the present paper, design procedure to meet the requirement is proposed. The frequency characteristic of a SAW filter is characterized by a delta function model and an equivalent circuit model. The apodization is made by varying each electrode length of the input IDT. The objective function or the error norm between the required frequency characteristic and the calculated is defined. The calculation is repeated to minimize the objective function using Davidon-Fletcher-Powell (DFP) method. The paper demonstrates the design methodology of the SAW filters with a couple of worked examples and with some discussion to follow.

引用

页码：519 / 528

页数：10

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