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US 2012/0098618 A1Published application
Surface Acoustic Wave Filter and Duplexer Using Same
AssigneeKYOCERA Corporation
InventorHiroyuki Tanaka
Life of this patent
Estimating the term…
Abstract
An SAW filter and a duplexer excellent in electrical characteristics will be provided. An SAW filter has a piezoelectric substrate 40, a surface acoustic wave element 10 having a first IDT electrode 1 on the piezoelectric substrate 40, a first signal line 31 electrically connected to the first IDT electrode 1, and a ring-shaped reference potential line 9 which has a first intersecting portion intersecting with the first signal line 31 through an insulation member 41 and surrounds the surface acoustic wave element 10.
Claims11
A surface acoustic wave filter, comprising:
- a piezoelectric substrate;
- a surface acoustic wave element comprising a first IDT electrode on the piezoelectric substrate;
- a first signal line electrically connected to the first IDT electrode;
- and
- a ring-shaped reference potential line which comprises a first intersecting portion intersecting with the first signal line through a first insulation member and surrounds the surface acoustic wave element.
2 more elements
A surface acoustic wave filter, comprising:
- a piezoelectric substrate;
- a surface acoustic wave element comprising
- a first IDT electrode which is located on the piezoelectric substrate, and comprises a first signal bus bar conductor and a first reference potential bus bar conductor, and
- a second IDT electrode which is located on the piezoelectric substrate aligned with the first IDT electrode, and comprises a second signal bus bar conductor and a second reference potential bus bar conductor;
- a first signal line electrically connected to the first signal bus bar conductor;
- a second signal line electrically connected to the second signal bus bar conductor;
- and
- a ring-shaped reference potential line which is connected to each of the first and second reference potential bus bar conductors and surrounds the surface acoustic wave element.
5 more elements
Dependencies are inferred from the claim text.