DocumentCode
1315901
Title
Directivity of group-type single phase unidirectional SAW transducers
Author
Morgan, D.P.
Volume
26
Issue
15
fYear
1990
fDate
7/19/1990 12:00:00 AM
Firstpage
1201
Lastpage
1203
Abstract
It is shown that the centre-frequency directivity for a SPUDT comprising conventional transducers alternating with reflecting gratings is determined simply by the grating reflection coefficient. This applies if the transducers and gratings are varied to weight the device. If the grating strips are all identical the directivity is proportional to the total number of grating strips.
Keywords
surface acoustic wave devices; ultrasonic transducers; SPUDT; centre-frequency directivity; grating reflection coefficient; grating strips; group-type single phase unidirectional SAW transducers; reflecting gratings;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19900777
Filename
82947
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