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US 10,547,284 B2Granted
Cascaded resonator
AssigneeQUALCOMM Incorporated
InventorAndreas Bergmann
Life of this patent
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Abstract
In a resonator, two interdigital transducers (W1,W2) are electrically series-connected and arranged next to each other in the longitudinal direction within an acoustic track delimited by reflectors. Between the two interdigital transducers, a transition area (UEB) is formed in that the finger period p, which is defined as the distance between the finger centers of adjacent transducer fingers, is higher in comparison to the remaining interdigital transducer.
Claims11
A resonator comprising:
- more than two interdigital transducers arranged next to each other in a longitudinal direction within an acoustic track delimited by reflectors,
- wherein the interdigital transducers are electrically connected between two connections,
- wherein a transition area is formed across each of mutually facing ends of the interdigital transducers that are adjacent to each other,
- wherein each of the transition areas comprises n terminal transducer fingers which are assigned to one or more of the adjacent interdigital transducers,
- wherein a finger period p, which is defined as a distance between finger centers of adjacent transducer fingers, is higher in the transition areas in comparison to remaining areas of the interdigital transducers, and
- wherein n is a whole number with 1<n<16.
3 more elements
Dependencies are inferred from the claim text.