Title :
Design of surface-acoustic-wave filters by taking account of electrical terminations and matching circuits
Author :
Yamaguchi, Masatsune ; Kogo, Hiroshi
Author_Institution :
Chiba University, Faculty of Engineering, Chiba, Japan
Abstract :
This letter describes a method of determining overlap width for interdigital electrodes of s.a.w. filters by taking account of electrical terminations and matching circuits. A filter with 22.5% bandwidth is designed by use of damped least squares. Since the amplitude response in the passband can be considerably improved compared with that designed by a Fourier analysis, this method may be useful when the required passband shape is strictly specified.
Keywords :
acoustic surface wave devices; band-pass filters; acoustic surface wave filters; amplitude response; bandpass filters; damped least squares; design; electrical terminations; interdigital electrodes; matching circuits; overlap width;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19760140
