Optimization of inner structure of fan-shaped SAW transducers

Author

Bausk, Evgeniy V.

Author_Institution

Inst. of Semicond. Phys., Novosibirsk, Russia

fYear

2000

fDate

2000

Firstpage

311

Lastpage

314

Abstract

An optimization procedure is proposed for improving selectivity of fan-shaped interdigital transducers (FIDT) weighted by assignment of polarities of individual electrodes. At the first stage, weighting functions for input and output FIDTs are chosen, according to which initial electrode structures are formed. At the main stage a more precise tuning of electrode polarity arrangement is performed to meet filter frequency response specifications in the best way. SAW filters with bandwidth of 2-50% and out-of-band rejection of 47-60 dB have been designed with using the described algorithm

Keywords

circuit optimisation; electrodes; frequency response; interdigital transducers; surface acoustic wave filters; surface acoustic wave transducers; 47 to 60 dB; 47-60 dB out-of-band rejection; SAW filters; assignment of polarities; electrode polarity; fan-shaped SAW transducers; filter frequency response specifications; initial electrode structures; inner structure; interdigital transducers; optimization; selectivity; tuning; weighting functions; Algorithm design and analysis; Band pass filters; Bandwidth; Electrodes; Frequency response; Physics; SAW filters; Surface acoustic waves; Transducers; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium and Exhibition, 2000. Proceedings of the 2000 IEEE/EIA International

Conference_Location

Kansas City, MO

ISSN

1075-6787

Print_ISBN

0-7803-5838-4

Type

conf

DOI

10.1109/FREQ.2000.887372

Filename

887372