LiNbO
            <sub>3</sub>
            -quartz-LiNbO
            <sub>3</sub>
            composite delay line with zero linear temperature coefficient of delay

Wauk, M.T.

doi:10.1049/el:19740084

Cited by 6 publications

References 2 publications

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Berlinite, a temperature-compensated material for surface acoustic wave applications

Jhunjhunwala

Vetelino

Field

1977

Journal of Applied Physics

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The surface and pseudosurface acoustic wave properties of berlinite (α-AlPO4) have been theoretically predicted in order to evaluate the merit of using this material in related surface acoustic wave devices. The surface and pseudosurface acoustic wave velocities, an estimate of the electromagnetic to acoustic coupling, the temperature coefficient of delay, the powerflow angle, and the attenuation have been determined for several standard crystallographic cuts. These results supplement the results given by Carr and O’Connell. This material is shown to possess several temperature-compensated cuts and about four times the coupling of α-quartz. It is pointed out that α-AlPO4 may be only one of many potentially temperature-compensated materials with a silica derivative-type structure.

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Berlinite, a temperature-compensated material for surface acoustic wave applications

Jhunjhunwala

Vetelino

Field

1977

Journal of Applied Physics

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Temperature-compensated surface-acoustic-wave devices with SiO2 film overlays

Parker

Wichansky

1979

Journal of Applied Physics

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Temperature-stable surface-acoustic-wave (SAW) devices have been fabricated with an rf-sputtered SiO3. film overlay on YZ LiTaO2. The material properties of this composite structure relevant to surface-acoustic-wave propagation have been thoroughly studied. For an SiO2 film thickness of approximately one-half of an acoustic wavelength, a piezoelectric coupling coefficient of 0.014 is present and the temperature stability of phase delay is similar in magnitude to that of bulk acoustic waves in AT-cut quartz. A variation in delay of less than one part in 105 is observed over the temperature range −40 to 80 °C. The film-overlay structure is dispersive and the nature of this dispersion has been fully characterized. The dependence of the phase and group delay on temperature and frequency has been measured. For most characteristics, theoretical as well as experimental values have been determined. In addition to YZ LiTaO3, five other cuts of LiTaO3 have been analyzed theoretically. To demonstrate potential applications for this structure, several practical devices have been fabricated and tested. Narrow-band delay lines have been fabricated for use in SAW-controlled oscillators. These oscillators showed a temperature stability nearly ten times better than similar devices fabricated on ST-cut quartz. Also, to demonstrate a wide-bandwidth application, a 13-bit Barker code, matched-filter pair has been fabricated. These devices also performed well.

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Experimental measurement of the SAW properties of berlinite

Morency

Soluch

Vetelino

et al. 1978

Applied Physics Letters

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LiNbO ₃ -quartz-LiNbO ₃ composite delay line with zero linear temperature coefficient of delay

Cited by 6 publications

References 2 publications

Berlinite, a temperature-compensated material for surface acoustic wave applications

Berlinite, a temperature-compensated material for surface acoustic wave applications

Temperature-compensated surface-acoustic-wave devices with SiO2 film overlays

Experimental measurement of the SAW properties of berlinite

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LiNbO 3 -quartz-LiNbO 3 composite delay line with zero linear temperature coefficient of delay

Cited by 6 publications

References 2 publications

Berlinite, a temperature-compensated material for surface acoustic wave applications

Berlinite, a temperature-compensated material for surface acoustic wave applications

Temperature-compensated surface-acoustic-wave devices with SiO2 film overlays

Experimental measurement of the SAW properties of berlinite

Contact Info

Product

Resources

About

LiNbO ₃ -quartz-LiNbO ₃ composite delay line with zero linear temperature coefficient of delay