Tags

Type your tag names separated by a space and hit enter

A SAW resonator with two-dimensional reflectors.
IEEE Trans Ultrason Ferroelectr Freq Control. 2010 Jan; 57(1):30-7.IT

Abstract

It is known that a part of the loss of leaky SAW resonators is due to radiation of acoustic energy in the bus-bars. Many researchers are working on so-called phononic crystals. A 2-D grating of very strong reflectors allows these devices to fully reflect, for a given frequency band, any incoming wave. A new device based on the superposition of a regular SAW resonator and a 2-D periodic grating of reflectors is proposed. Several arrangements and geometries of the reflectors were studied and compared experimentally on 48 degrees rotated Y-cut lithium tantalate. In particular, a very narrow aperture (7.5 lambda) resonator was manufactured in the 900 MHz range. Because of its small size, this resonator has a resonance Q of only 575 when using the standard technology, whereas a resonance Q of 1100 was obtained for the new device without degradation of the other characteristics. Because of the narrow aperture, the admittance of the standard resonator showed a very strong parasitic above the resonance frequency, whereas this effect is drastically reduced for the new device. These results demonstrate the feasibility of the new approach.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Solal M
TriQuint Semiconductor, Apopka, FL, USA. marc.solal@tqs.com
Gratier J
No affiliation info available
Kook T
No affiliation info available

MeSH

AcousticsComputer-Aided DesignEquipment DesignEquipment Failure AnalysisLensesMicro-Electrical-Mechanical SystemsReproducibility of ResultsSensitivity and SpecificityTransducersVibration

Pub Type(s)

Journal Article

Language

eng

PubMed ID

20040423

Citation

Solal, Marc, et al. "A SAW Resonator With Two-dimensional Reflectors." IEEE Transactions On Ultrasonics, Ferroelectrics, and Frequency Control, vol. 57, no. 1, 2010, pp. 30-7.
Solal M, Gratier J, Kook T. A SAW resonator with two-dimensional reflectors. IEEE Trans Ultrason Ferroelectr Freq Control. 2010;57(1):30-7.
Solal, M., Gratier, J., & Kook, T. (2010). A SAW resonator with two-dimensional reflectors. IEEE Transactions On Ultrasonics, Ferroelectrics, and Frequency Control, 57(1), 30-7. https://doi.org/10.1109/TUFFC.2010.1375
Solal M, Gratier J, Kook T. A SAW Resonator With Two-dimensional Reflectors. IEEE Trans Ultrason Ferroelectr Freq Control. 2010;57(1):30-7. PubMed PMID: 20040423.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A SAW resonator with two-dimensional reflectors. AU - Solal,Marc, AU - Gratier,Julien, AU - Kook,Taeho, PY - 2009/12/31/entrez PY - 2009/12/31/pubmed PY - 2010/3/11/medline SP - 30 EP - 7 JF - IEEE transactions on ultrasonics, ferroelectrics, and frequency control JO - IEEE Trans Ultrason Ferroelectr Freq Control VL - 57 IS - 1 N2 - It is known that a part of the loss of leaky SAW resonators is due to radiation of acoustic energy in the bus-bars. Many researchers are working on so-called phononic crystals. A 2-D grating of very strong reflectors allows these devices to fully reflect, for a given frequency band, any incoming wave. A new device based on the superposition of a regular SAW resonator and a 2-D periodic grating of reflectors is proposed. Several arrangements and geometries of the reflectors were studied and compared experimentally on 48 degrees rotated Y-cut lithium tantalate. In particular, a very narrow aperture (7.5 lambda) resonator was manufactured in the 900 MHz range. Because of its small size, this resonator has a resonance Q of only 575 when using the standard technology, whereas a resonance Q of 1100 was obtained for the new device without degradation of the other characteristics. Because of the narrow aperture, the admittance of the standard resonator showed a very strong parasitic above the resonance frequency, whereas this effect is drastically reduced for the new device. These results demonstrate the feasibility of the new approach. SN - 1525-8955 UR - https://www.unboundmedicine.com/medline/citation/20040423/A_SAW_resonator_with_two_dimensional_reflectors_ L2 - https://dx.doi.org/10.1109/TUFFC.2010.1375 DB - PRIME DP - Unbound Medicine ER -