作者: Mitsuhiro Tanaka , Kazuhiko Yamanouchi , Yasufumi Horio
DOI:
关键词:
摘要: A surface acoustic wave filter device includes a substrate which quartz or the like piezoelectric material having small temperature coefficient. The has is formed with interdigital-type unidirectional transducers on input and output sides, each positive electrode negative electrode. electrodes of side have fingers are arranged so as to transduce harmonic selected order higher relative fundamental wave.