Efficient 3-D Finite Element Modeling of Periodic XBAR Resonators

An efficient technique is presented for 3-D finite element modeling of large-scale periodic excited bulk acoustic resonator (XBAR) resonators in the time-harmonic domain. In this technique, a domain decomposition scheme is used to decompose the computational domain into many small subdomains whose F...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2023-07, Vol.70 (7), p.759-771
Main Authors: Li, Hongliang, Koskela, Julius, Massey, Jackson W, Willemsen, Balam, Jin, Jian-Ming
Format: Article
Language:English
Subjects:
Algorithms
Bulk acoustic wave devices
Domain decomposition methods
Evanescent waves
Finite element method
Mathematical models
Resonators
Subsystems
Three dimensional models
Wave propagation
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An efficient technique is presented for 3-D finite element modeling of large-scale periodic excited bulk acoustic resonator (XBAR) resonators in the time-harmonic domain. In this technique, a domain decomposition scheme is used to decompose the computational domain into many small subdomains whose FE subsystems can be factorized with a direct sparse solver at a low cost. Transmission conditions (TCs) are enforced to interconnect adjacent subdomains, and a global interface system is formulated and solved iteratively. To accelerate the convergence, a second-order TC (SOTC) is designed to make the subdomain interfaces transparent for propagating and evanescent waves. An effective forward-backward preconditioner is constructed that when combined with the SOTC significantly reduce the number of iterations at no additional cost. Numerical results are given to demonstrate the accuracy, efficiency, and capability of the proposed algorithm.
ISSN:0885-3010
1525-8955
DOI:10.1109/TUFFC.2023.3277342