Elastic wave device
AssigneeMurata Manufacturing Co., Ltd.
InventorKenji Inate
Life of this patent
Estimating the term…
Abstract
An elastic wave device includes a piezoelectric substrate, a first elastic wave element on the piezoelectric substrate and including at least one first interdigital transducer electrode and a first reflector in an area of the first interdigital transducer electrode at one side in a propagation direction of elastic waves, and a second elastic wave element on the piezoelectric substrate and including at least one second interdigital transducer electrode and a second reflector in an area of the second interdigital transducer electrode at one side in the propagation direction of elastic waves. The first and second reflectors are disposed side by side in the propagation direction. A reflection member, between the first and second reflectors, reflects elastic waves in at least a direction different from the propagation direction.
Claims20
An elastic wave device, comprising:
- a piezoelectric substrate;
- a first elastic wave element disposed on the piezoelectric substrate and including at least one first interdigital transducer electrode and a first reflector disposed over an area of the first interdigital transducer electrode at one side portion in a propagation direction of elastic waves;
- and
- a second elastic wave element disposed on the piezoelectric substrate and including at least one second interdigital transducer electrode and a second reflector disposed over an area of the second interdigital transducer electrode at one side portion in the propagation direction of elastic waves;
- wherein
- the first reflector and the second reflector are disposed side by side in the propagation direction of elastic waves;
- the elastic wave device further includes a plurality of reflection members disposed in at least one row extending between the first reflector and the second reflector and in a direction perpendicular or substantially perpendicular to the propagation direction of elastic waves, the plurality of reflection members reflecting elastic waves in at least a direction different from the propagation direction of elastic waves;
- and
- in each of the at least one row, each of the plurality of the reflection members have a same or substantially a same shape and size and an entirety of each of the plurality of the reflection members is aligned with an entirety of each of others of the plurality of the reflection members in the direction perpendicular or substantially perpendicular to the propagation direction of elastic waves.
An elastic wave device, comprising:
- a piezoelectric substrate;
- a first elastic wave element disposed on the piezoelectric substrate and including at least one first interdigital transducer electrode and a first reflector disposed over an area of the first interdigital transducer electrode at one side portion in a propagation direction of elastic waves;
- and
- a second elastic wave element disposed on the piezoelectric substrate and including at least one second interdigital transducer electrode and a second reflector disposed over an area of the second interdigital transducer electrode at one side portion in the propagation direction of elastic waves;
- wherein
- the first reflector and the second reflector are disposed side by side in the propagation direction of elastic waves;
- the elastic wave device further includes a plurality of reflection members disposed in at least one row extending between the first reflector and the second reflector and in a direction perpendicular or substantially perpendicular to the propagation direction of elastic waves, the plurality of reflection members reflecting elastic waves in at least a direction different from the propagation direction of elastic waves;
- and
- in each of the at least one row, each of the plurality of the reflection members has a same or substantially a same shape and size and a center of each of the plurality of the reflection members is aligned with a center of each of others of the plurality of the reflection members in the direction perpendicular or substantially perpendicular to the propagation direction of elastic waves.
Dependencies are inferred from the claim text.