Fujitsu Corporation

Epcos Ag

Ken-ya Hashimoto

Masanori Ueda

Osamu Kawachi

Osamu Ikata

Gou Endoh

Masatsune Yamaguchi

Werner Ruile

Thomas Bauer

Ulrike Roesler

Michael Jakob

Veit Meister

Heide Kuhrau

A component operating with surface-proximal acoustic waves, in particular a filter with novel structure, has interdigital transducers arranged in serial and parallel branches, which are acoustically coupled with one another in different configurations. The component provides a loss-poor filter with simultaneously space-saving arrangement of the filter elements.

Filter with acoustically coupled resonators

A surface acoustic wave device includes a piezoelectric substrate of a single crystal LiTaO,and an electrode pattern provided on the piezoelectric substrate. The electrode pattern contains Al as a primary component and has a thickness in a range of 0.03-0.15 times a wavelength of a surface acoustic wave excited on the piezoelectric substrate. The piezoelectric substrate has an orientation rotated about an X-axis thereof from a Y-axis thereof toward a Z-axis thereof, with a rotational angle of 38-46&deg;.

Surface acoustic wave device using a leaky surface acoustic wave with an optimized cut angle of a piezoelectric substrate

A surface acoustic wave device includes a piezoelectric substrate of a single crystal LiTaO.sub.3 and an electrode pattern provided on the piezoelectric substrate. The electrode pattern contains Al as a primary component and has a thickness in a range of 0.03-0.15 times a wavelength of a surface acoustic wave excited on the piezoelectric substrate. The piezoelectric substrate has an orientation rotated about an X-axis thereof from a Y-axis thereof toward a Z-axis thereof, with a rotational angle of 39-46.degree..

Surface acoustic wave device using a leaky surface acoustic wave with an

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Funabashi, Japan

Ken-ya Hashimoto