Focusing transformers/filters in isotropic/anisotropic piezoelectrics
Abstract
A focusing interdigital transducer (IDT) and corresponding single- and dual-port piezoelectric devices are disclosed. The focusing interdigital transducer, which generates Lamé acoustic waves, permits operation at significantly higher frequencies than those possible with traditional IDTs. The focusing IDT employs multiple arced fingers formed both above and below the piezoelectric layer to improve coupling efficiency by coupling through both the e31 and e33 piezoelectric coefficients to the piezoelectric layer. By optimizing both anchor design and location, acoustic wave losses are minimized, thereby improving the device's quality factor Q. Through proper bus design and selection of the number of IDT fingers, a device's impedance can be tuned for a given application. The focusing IDTs may be used in single-port filter devices and dual-port transformer devices. The single- and dual-port devices may operate at a single frequency, at two frequencies, or over a band of frequencies.
- Inventors:
- Issue Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1823856
- Patent Number(s):
- 10979018
- Application Number:
- 16/558,453
- Assignee:
- National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H03 - BASIC ELECTRONIC CIRCUITRY H03H - IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
- DOE Contract Number:
- NA0003525
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 09/03/2019
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Siddiqui, Aleem, Eichenfield, Matt, Griffin, Benjamin, and Nordquist, Christopher. Focusing transformers/filters in isotropic/anisotropic piezoelectrics. United States: N. p., 2021.
Web.
Siddiqui, Aleem, Eichenfield, Matt, Griffin, Benjamin, & Nordquist, Christopher. Focusing transformers/filters in isotropic/anisotropic piezoelectrics. United States.
Siddiqui, Aleem, Eichenfield, Matt, Griffin, Benjamin, and Nordquist, Christopher. Tue .
"Focusing transformers/filters in isotropic/anisotropic piezoelectrics". United States. https://www.osti.gov/servlets/purl/1823856.
@article{osti_1823856,
title = {Focusing transformers/filters in isotropic/anisotropic piezoelectrics},
author = {Siddiqui, Aleem and Eichenfield, Matt and Griffin, Benjamin and Nordquist, Christopher},
abstractNote = {A focusing interdigital transducer (IDT) and corresponding single- and dual-port piezoelectric devices are disclosed. The focusing interdigital transducer, which generates Lamé acoustic waves, permits operation at significantly higher frequencies than those possible with traditional IDTs. The focusing IDT employs multiple arced fingers formed both above and below the piezoelectric layer to improve coupling efficiency by coupling through both the e31 and e33 piezoelectric coefficients to the piezoelectric layer. By optimizing both anchor design and location, acoustic wave losses are minimized, thereby improving the device's quality factor Q. Through proper bus design and selection of the number of IDT fingers, a device's impedance can be tuned for a given application. The focusing IDTs may be used in single-port filter devices and dual-port transformer devices. The single- and dual-port devices may operate at a single frequency, at two frequencies, or over a band of frequencies.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2021},
month = {4}
}
Works referenced in this record:
Laterally-coupled acoustic resonators
patent-application, December 2013
- Wang, Kun
- US Patent Application 13/488726; 20130321100