DocumentCode
947516
Title
S.A.W. bandpass filter with ¿50 dB sidelobes using unweighted i.d.t.s
Author
Sudhakar, P. ; Bhattacharyya, A.B. ; Mathur, Bimal
Author_Institution
Indian Institute of Technology, Centre for Applied Research in Electronics, Department of Electrical Engineering, New Delhi, India
Volume
14
Issue
14
fYear
1978
Firstpage
437
Lastpage
439
Abstract
The use of a resonantly loaded i.d.t. (r.l.i.d.t.) as an s.a.w. track changer in bandpass filter design is described. A filter with 3dB fractional bandwidth (f.b.w.) of 11.5% and ¿50 dB sidelobes is realised using unweighted input/output i.d.t.s of 5¿ finger pairs each and a 7¿ finger pair r.l.i.d.t. as the s.a.w. track changer. The scheme is expected to be useful in realising low-shape-factor low-sidelobe bandpass filters using relatively short i.d.t.s.
Keywords
band-pass filters; surface acoustic wave devices; -50 dB sidelobes; 3 dB fractional bandwidth; SAW bandpass filter; resonantly loaded interdigital transducer; surface acoustic wave; unweighted IDT;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19780293
Filename
4242572
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