© The Institution of Electrical Engineers
Design of periodic 1–3 piezocomposite transducers requires that the period be made small enough to shift the spurious (band-edge) modes to frequencies well above the desired thickness mode. Modelling of one-dimensional composites indicates that band-edge modes can be modified by using multiple-period dicing in the fabrication process. Experimental data confirming this theoretical prediction, and showing that distributed-period dicing is more effective in suppressing spurious modes, are presented for two-dimensionally piezocomposite transducers.
References
-
-
1)
-
S. Ikegami ,
I. Ueda ,
S. Kobayashi
.
Frequency spectra of resonant vibration in disk plates of PbTIO3 piezoelectric ceramics.
J. Acoust. Soc. Am.
,
339 -
344
-
2)
-
T.R. Gururaja ,
W.A. Schulze ,
L.E. Cross ,
R.E. Newnham ,
B.A. Auld ,
Y.J. Wang
.
Piezoelectric composite materials for ultrasonic transducer applications. Part I: Resonant modes of vibration for PZT rod-polymer composites.
IEEE Trans.
,
481 -
498
-
3)
-
B.A. Auld
.
(1990)
, Acoustic fields and waves in solids.
-
4)
-
R.E. Collin
.
(1966)
, Foundations for microwave engineering.
-
5)
-
G. Hayward ,
J.A. Hossack
.
Unidimcnsional modeling of 1–3 composite transducers.
J. Acoust. Soc. Am.
,
599 -
608
-
6)
-
Oakley, C.G.: `Analysis and development of piezoelectric composites for medical ultrasound transducer applications', 1991, PhD Thesis, The Pennsylvania State University, State College, Dept. of Elec. Eng., PA.
-
7)
-
J.A. Hossack ,
G. Hayward
.
Finite element analysis of composite transducers.
IEEE Trans.
-
8)
-
W.A. Smith ,
B.A. Auld
.
Modeling 1–3 composite piezoelcctrics: thickness-mode oscillations.
IEEE Trans.
,
40 -
47
http://iet.metastore.ingenta.com/content/journals/10.1049/el_19910804
Related content
content/journals/10.1049/el_19910804
pub_keyword,iet_inspecKeyword,pub_concept
6
6