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Science Newsletter of the Faculty fo Physics
This is a new bulletin, which, as we hope, will bring fresh, updated information on scientific news, research activities, and related events in the life of our department to our staff members, undegraduate and graduate students, postdocs, collaborators and partners. We greatly hope that this Science Newsletter will help us to find new partners in research and shorten the way from fundamental research to applications and innovations, from our fundamental discoveries to their successful implementations in not too distant future.
XIV National School-Seminar "Wave phenomena in inhomogeneous media"
The conference papers from the School-Seminar «Waves-2014» will be submitted for publishing in the Memoirs of the Faculty of Physics journal.
| Journals » Memoirs of the Faculty of Physics » Issues » 2014 » # 5 |
Theoretical Model of Lateral Electric Field Excited Resonator
A.A.Teplykh, B.D.Zaitsev, I.E.Kuznetsova
Saratov Branch of Institute of Radio Engineering and Electronics nm.V.A.Kotelnikov RAS, Saratov, RussiaThe method of calculation of characteristics of acoustic oscillations existing in piezoelectric electric field excited resonator was developed. The resonator represents thin piezoelectric plate with two rectangular electrodes on one its side. The developed method is based on the finite element analysis and allows to find the distribution of the mechanical displacement components in piezoelectric plate and electrical potential in piezoelectric plate and surrounding vacuum for the given value of frequency of excited field. At that this method allows to consider various boundary conditions on different areas of surface plate including the presence of damping layers. This allows to calculate the real and imaginary parts of electrical impedance as function of frequency. The resonator under study represented the plate of $X$ – cut lithium niobate with thickness of 0.5 mm. Two rectangular electrodes with width of 5 mm were deposited on one side of the plate in such a way that excited electric field was oriented along crystallographic axis $Y$. The calculations were carried out for different values of width of the gap between electrodes in a range 1 – 3 mm. It has been shown that the increase in the width of gap leads to insignificant increase in resonant frequency and the use of damping layers on outside parts of electrodes allows significantly increase its $Q$-factor. The obtained results are in a satisfactory agreement with experimental data.
| URL: | http://uzmu.phys.sunmarket.com/abstract/2014/5/145328 |
| PACS: | 43.20.+g General linear acoustics |
| UDC: | 534.2 |
| Цитата: | А.А.Теплых, Б.Д.Зайцев, И.Е.Кузнецова. Теоретическая модель резонатора с поперечным возбуждающим электрическим полем // Учен. зап. физ. фак-та Моск. ун-та. 2014. № 5. 145328 |