Study of voltage tunable SAW hybrid devices

Author

Elkordy, M.

Author_Institution

Dept. of Electr. Commun., Menoufia Univ., Egypt

fYear

2003

fDate

Oct. 28 2003-Nov. 1 2003

Firstpage

750

Lastpage

753

Abstract

A theoretical study of voltage tunable hybrid surface acoustic wave (SAW) devices is presented. In this study the voltage tunable carrier concentration as well as conductivity have been calculated using least square method. The piezoelectric fields of the SAW are coupled to the free carrier in the semiconductor and induced this interaction. The carrier concentration in the semiconductor is varied by biasing potential. The control of carrier concentration leads to voltage control conductivity. The tunability of the conductivity in the semiconductor results in a large change of the SAW velocity and phase. The attenuation of the SAW can be calculated in terms of the tunable conductivity. A voltage control SAW oscillators, delay line and SAW voltage sensor can be realized.

Keywords

carrier density; electrical conductivity; least squares approximations; piezoelectric materials; semiconductor devices; surface acoustic wave devices; voltage control; SAW voltage sensor; attenuation; biasing potential; control SAW oscillators; delay line; least square method; piezoelectric fields; surface acoustic wave devices; tunable carrier concentration; voltage control conductivity; voltage tunable hybrid; Acoustic propagation; Acoustic waves; Attenuation; Conductivity; Frequency; Piezoelectric materials; Surface acoustic wave devices; Surface acoustic waves; Voltage control; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas, Propagation and EM Theory, 2003. Proceedings. 2003 6th International SYmposium on

Conference_Location

Beijing, China

Print_ISBN

0-7803-7831-8

Type

conf

DOI

10.1109/ISAPE.2003.1276795

Filename

1276795