Taiyo Yuden Co., Ltd.

Fujitsu Media Devices Limited

Kouta Ohkubo

Osamu Kawachi

Yasufumi Kaneda

Satoru Ono

Hidemitsu Kuboi

An acoustic wave filter includes a piezoelectric substrate, an IDT (interdigital transducer) formed on the piezoelectric substrate, and reflectors located at both sides of the IDT and composed of electrode fingers, at least one of the electrode fingers of at least one of the reflectors including at least one gap within a propagation path of an acoustic wave.

Acoustic wave filter comprising a reflector having an oblique slit

A filter includes: a first acoustic wave filter having acoustic wave filters cascaded, an input stage of the acoustic wave filters including a first multimode filter; a second acoustic wave filter having acoustic wave filters cascaded, an input stage of these acoustic wave filters including a second multimode filter having an aperture length different from that of the first multimode filter, the second acoustic wave filter receiving an unbalanced in signal applied to the first acoustic wave filter, and having a pass band that does not overlap with that of the first acoustic wave filter.

Growing community of inventors

Yokohama, Japan

Kouta Ohkubo