ACOUSTIC WAVE FILTER AND COMPOSITE FILTER DEVICE
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United States of America Patent
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Issued Date -
Sep 7, 2023
app pub date -
May 12, 2023
filing date -
Nov 18, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
An acoustic wave filter includes an input end, an output end, and a series arm connecting the input end and the output end. The series arm includes n (n=3) acoustic wave resonators connected in series in an order of first, second, and third acoustic wave resonators. The first, second, and third acoustic wave resonators include multiple electrode fingers. The first, second, and third acoustic wave resonators include an mth acoustic wave resonator (m is a natural number of 1
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