Effect of anisotropy on characteristics and behavior of shear horizontal SAWs in resonators using langasite.
IEEE Trans Ultrason Ferroelectr Freq Control. 2012 Nov; 59(11):2515-21.IT

Abstract

Orientations of langasite (LGS) with Euler angles (0°, μ, 90°) are potentially useful for applications in wireless SAW sensors because of wide variation of their temperature coefficient of frequency (TCF), between -50 and +50 ppm/°C, combined with high values of electromechanical coupling coefficient, especially if thick electrodes are utilized. The nature and characteristics of shear-horizontally polarized SAWs (SHSAWs) propagating in these orientations are investigated using a combination of numerical techniques: analysis of the BAW slowness surface and its effect on the SH-SAW structure; visualization of displacements that follow wave propagation in the grating; calculation of admittance of infinite periodic gratings; and analysis of SAW dispersion in the gratings, including possible interaction between SH-SAWs and parasitic Rayleigh SAWs. The characteristics of SH-SAWs propagating in symmetric cuts (velocities, localization depth, electromechanical coupling, etc.) are supplemented by analysis of propagation directions deviating from the YZ-plane toward the x-axis of LGS, for the temperature compensated cut with Euler angles (0°, 22°, 90°) and one more orientation for comparison. This extended analysis reveals that in actual devices, the anisotropy may be a reason for strong interaction between SH-SAWs and parasitic Rayleigh SAWs and cause degradation of the device's performance.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Naumenko NF

Moscow Steel and Alloys Institute, Moscow, Russia. nnaumenko@ieee.org

Pub Type(s)

Journal Article

Language

eng

PubMed ID

23192815

Citation

Naumenko, Natalya F.. "Effect of Anisotropy On Characteristics and Behavior of Shear Horizontal SAWs in Resonators Using Langasite." IEEE Transactions On Ultrasonics, Ferroelectrics, and Frequency Control, vol. 59, no. 11, 2012, pp. 2515-21.

Naumenko NF. Effect of anisotropy on characteristics and behavior of shear horizontal SAWs in resonators using langasite. IEEE Trans Ultrason Ferroelectr Freq Control. 2012;59(11):2515-21.

Naumenko, N. F. (2012). Effect of anisotropy on characteristics and behavior of shear horizontal SAWs in resonators using langasite. IEEE Transactions On Ultrasonics, Ferroelectrics, and Frequency Control, 59(11), 2515-21. https://doi.org/10.1109/TUFFC.2012.2484

Naumenko NF. Effect of Anisotropy On Characteristics and Behavior of Shear Horizontal SAWs in Resonators Using Langasite. IEEE Trans Ultrason Ferroelectr Freq Control. 2012;59(11):2515-21. PubMed PMID: 23192815.

* Article titles in AMA citation format should be in sentence-case

TY - JOUR T1 - Effect of anisotropy on characteristics and behavior of shear horizontal SAWs in resonators using langasite. A1 - Naumenko,Natalya F, PY - 2012/11/30/entrez PY - 2012/11/30/pubmed PY - 2012/11/30/medline SP - 2515 EP - 21 JF - IEEE transactions on ultrasonics, ferroelectrics, and frequency control JO - IEEE Trans Ultrason Ferroelectr Freq Control VL - 59 IS - 11 N2 - Orientations of langasite (LGS) with Euler angles (0°, μ, 90°) are potentially useful for applications in wireless SAW sensors because of wide variation of their temperature coefficient of frequency (TCF), between -50 and +50 ppm/°C, combined with high values of electromechanical coupling coefficient, especially if thick electrodes are utilized. The nature and characteristics of shear-horizontally polarized SAWs (SHSAWs) propagating in these orientations are investigated using a combination of numerical techniques: analysis of the BAW slowness surface and its effect on the SH-SAW structure; visualization of displacements that follow wave propagation in the grating; calculation of admittance of infinite periodic gratings; and analysis of SAW dispersion in the gratings, including possible interaction between SH-SAWs and parasitic Rayleigh SAWs. The characteristics of SH-SAWs propagating in symmetric cuts (velocities, localization depth, electromechanical coupling, etc.) are supplemented by analysis of propagation directions deviating from the YZ-plane toward the x-axis of LGS, for the temperature compensated cut with Euler angles (0°, 22°, 90°) and one more orientation for comparison. This extended analysis reveals that in actual devices, the anisotropy may be a reason for strong interaction between SH-SAWs and parasitic Rayleigh SAWs and cause degradation of the device's performance. SN - 1525-8955 UR - https://www.unboundmedicine.com/medline/citation/23192815/Effect_of_anisotropy_on_characteristics_and_behavior_of_shear_horizontal_SAWs_in_resonators_using_langasite_ L2 - https://dx.doi.org/10.1109/TUFFC.2012.2484 DB - PRIME DP - Unbound Medicine ER -

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Effect of anisotropy on characteristics and behavior of shear horizontal SAWs in resonators using langasite.IEEE Trans Ultrason Ferroelectr Freq Control. 2012 Nov; 59(11):2515-21.IT