Andrey A. Teplykh

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The piezoelectric lateral-electric-field-excited resonator based on an X-cut lithium niobate plate has been investigated. Two rectangular electrodes were applied on one side of the plate so that the lateral electric field components were parallel to the crystallographic Y-axis and excited the longitudinal wave in the gap between the electrodes. The region(More)
At present lateral electric field excited piezoelectric resonators widely used for development of various sensors. Previously we have studied the resonator based on the plate of lithium niobate operating in the frequency range 6-7 MHz. This resonator demonstrated high value of Q - factor but required the special measures for suppression of parasitic(More)
The characteristics of the three lowest order plate waves (A(0), S(0), and SH(0)) propagating in piezoelectric plates whose thickness h is much less than the acoustic wavelength lambda are theoretically analyzed. It is found that these waves can provide much higher values of electromechanical coupling coefficient K(2) and lower values of temperature(More)
The influence of viscous and conducting liquid on the characteristics of a piezoelectric lateral electric field-excited resonator based on the X-cut lithium niobate plate has been investigated. It has been found that the contact of a free surface of such resonator with conducting or viscous liquid leads to the substantial variation of its electrical(More)
The experimental study of acoustic waves propagating in the structure “piezoelectric plate I -vacuum gap - piezoelectric plate II” was carried out. The plate I contained two interdigital transducers, which excited and received acoustic wave with shear- horizontal polarization. The piezoelectric plate II was set from above between transducers.(More)
The fractional change in velocity and attenuation of the zero-order acoustic wave with shear-horizontal polarization propagating in &#x201C;YX LiNbO<sub>3</sub> - air gap - conducting film deposited of glass surface&#x201D; are experimentally investigated. The possibility of determination of film conductivity in such structure by the noncontact methods is(More)
The paper is devoted to the development of noncontact acoustic method of the determination of thin film conductivity. The method is based on the registration of the changes in velocity and attenuation of acoustic waves in the piezoelectric plate due to placing the structure &#x201C;film under study - dielectric substrate&#x201D; on the certain distance from(More)
An array containing two resonators placed on X-cut lithium niobate plate has been experimentally investigated. The resonator's lateral electric field was directed along the Y-crystallographic axis. It has been shown that stable resonance exists for a longitudinal acoustic wave propagating along the X-axis in the area between the electrodes. A layer of(More)
The acoustic biological sensor for the analysis of the bacterial cells in conducting suspension was developed. The sensor represented the two channel delay line based on the piezoelectric plate of Y-X lithium niobate thick of 0.2mm. Two pairs of the interdigital transducers (IDT) for the excitation and reception of shear horizontal acoustic wave of zero(More)
This paper presents experimental results for the characteristics of acoustic waves propagating in a structure containing two parallel piezoelectric plates (I and II) separated by an air gap. Plate I, made of Y-X lithium niobate, contained two interdigital transducers that excited and received an acoustic wave with shear-horizontal polarization.(More)