DocumentCode
1171256
Title
Surface-acoustic-wave unidirectional transducers using anodic oxidation technology and low-loss filters
Author
Yamanouchi, Kazuhiko ; Meguro, Tomomi ; Matsumoto, Kaname
Author_Institution
Tohoku Univ., Sendai, Japan
Volume
25
Issue
15
fYear
1989
fDate
7/20/1989 12:00:00 AM
Firstpage
958
Lastpage
960
Abstract
A new surface-acoustic-wave interdigital transducer (IDT) and unidirectional transducer (UDT) are described. Using a lift-off anodic oxidation method, controllable gaps between electrodes with good insulation can be obtained. Experimental results show good characteristics at 2nd-harmonic operation for a new floating electrode type unidirectional transducer (NG-FEUDT). Also, a low-loss filter of 3.46 dB with side-lobe suppression of 40 dB at 893 MHz is obtained using the above techniques.
Keywords
surface acoustic wave devices; surface acoustic wave filters; ultrasonic transducers; 2nd-harmonic operation; NG-FEUDT; anodic oxidation technology; floating electrode type; low-loss filters; side-lobe suppression; surface-acoustic-wave interdigital transducer; unidirectional transducer;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19890641
Filename
31965
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