Floating electrodes: additional opportunities for optimization of broadband polarity weighted SAW transducers

Author

Bausk, Evgeniy K.

Author_Institution

Inst. of Semicond. Phys., Novosibirsk, Russia

fYear

1998

fDate

27-29 May 1998

Firstpage

473

Lastpage

476

Abstract

Due to a low sensitivity to diffraction, the substitution of apodized transducers by uniform-beam-profile polarity weighted IDTs gives an opportunity to minimize SAW filter sizes by reducing its aperture. Inclusion of floating electrodes into the structure of the polarity weighted transducer makes the weighting procedure more flexible for forming specified broadband frequency responses. An optimization algorithm and a software for broadband polarity weighted interdigital transducers including floating electrodes has been developed. A set of PW IDTs for SAW filters with bandwidths of 2-13% has been designed using this algorithm

Keywords

electrodes; frequency response; interdigital transducers; optimisation; surface acoustic wave filters; surface acoustic wave transducers; SAW filter size minimization; SAW transducer optimization; broadband polarity weighted SAW transducers; delta function model; flexible weighting procedure; floating electrodes; optimization algorithm; specified broadband frequency responses; uniform-beam-profile polarity weighted IDT; Apertures; Bandwidth; Electrodes; Frequency response; Physics; SAW filters; Shape; Surface acoustic waves; Time factors; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium, 1998. Proceedings of the 1998 IEEE International

Conference_Location

Pasadena, CA

ISSN

1075-6787

Print_ISBN

0-7803-4373-5

Type

conf

DOI

10.1109/FREQ.1998.717940

Filename

717940