Title :
Suppression of bulk modes in SAW transversal filters by gold transducers
Author_Institution :
British Telecom Research Laboratories, Ipswich, UK
Abstract :
Unwanted bulk modes in surface-acoustic-wave (SAW) transversal filters are demonstrated to be dependent on the transducer metallisation. Experimental results are presented that compare Au with the more conventional Al metallisation and show that bulk modes can be suppressed by > 20 dB.
Keywords :
passive filters; surface acoustic wave devices; ultrasonic transducers; Au transducers; SAW transversal filters; bulk modes suppression; metallisation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19830086
