Title
Improved Reflectivity And Velocity Model For Aluminum Gratings On Yz Linbo3
Abstract
Lithium niobate has recently been used for SAW tags and temperature sensors because of its high coupling coefficient and high reflectivity. To increase the device operating frequency for a given electrode line resolution, harmonic operation of the reflector is a very attractive option. When used in conjunction with harmonically operated transducers, the device operating frequency can be increased for a given photolithographic line width resolution. To design and accurately predict the behavior of these devices, it is necessary to model the electrode reflectivity and velocity for both fundamental and second-harmonic operation. The coupling of modes (COM) model has been used to model these devices, however the COM model uses empirically determined coefficients to model reflectivity. In this paper, the reflectivity and velocity of aluminum electrodes is extracted experimentally for fundamental and second-harmonic operation versus metalization ratios ranging from 0.2 to 0.9 and versus normalized metal thickness ranging from 0.4% to 4%. A least-squares fit is then performed on the data using physical terms in the transmission line model to yield equations that can be used in the COM model to predict device behavior over varying metallization ratios and normalized metal thicknesses. Orthogonal frequency-coded (OFC) SAW tags were designed and fabricated and experimentally obtained data are compared with the COM modeled responses for the tags at fundamental and second-harmonic operation to verify the predictions. © 2006 IEEE.
Publication Date
4-1-2011
Publication Title
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume
58
Issue
4
Number of Pages
798-807
Document Type
Article
Personal Identifier
scopus
DOI Link
https://doi.org/10.1109/TUFFC.2011.1872
Copyright Status
Unknown
Socpus ID
79955416863 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/79955416863
STARS Citation
Saldanha, Nancy and Malocha, Donald C., "Improved Reflectivity And Velocity Model For Aluminum Gratings On Yz Linbo3" (2011). Scopus Export 2010-2014. 3415.
https://stars.library.ucf.edu/scopus2010/3415