Closed form solutions for multistrip coupler operation including the effects of electrode resistivity

Author

Abbott, B.P. ; Malocha, D.C.

Author_Institution

Dept. of Electr. Eng., Univ. of Central Florida, Orlando, FL, USA

fYear

1990

fDate

4-7 Dec 1990

Firstpage

25

Abstract

The coupling-of-modes (COM) model is applied to the analysis of multistrip couplers (MSCs). By merging the COM formalism with the classical one-dimensional symmetric/antisymmetric mode representation of the MSC, both the effects of finite finger resistance and electrode reflections are included in the modeling of the MSC. The use of the COM formalism allows closed-form solutions to be obtained for MSC operation. Using the COM model for surface acoustic wave (SAW) propagation and the symmetric/antisymmetric modeling of the MSC, solutions to MSC operation are derived for a general three-track coupler. To verify the approach, simplified solutions neglecting finger reflections, but including finger resistance, are presented for comparison with solutions by other theories

Keywords

directional couplers; surface acoustic wave devices; SAW propagation; acoustic directional coupler; classical 1D symmetric/antisymmetric mode representation; closed-form solutions; coupling of modes model; electrode reflections; electrode resistivity; finite finger resistance; multistrip coupler; three-track coupler; Acoustic propagation; Closed-form solution; Counting circuits; Electrodes; Equations; Fingers; Laboratories; Reflection; Solid state circuits; Surface acoustic waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1990. Proceedings., IEEE 1990

Conference_Location

Honolulu, HI

Type

conf

DOI

10.1109/ULTSYM.1990.171321

Filename

171321