Twin Double-Mode Surface-Acoustic-Wave (DMS) Filters with Opposite Polarities and a Geometric Offset
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United States of America Patent
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Issued Date -
Feb 1, 2024
app pub date -
Jul 27, 2022
filing date -
Jul 27, 2022
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Abstract
An apparatus for filtering is disclosed that implements twin double-mode surface-acoustic-wave filters with opposite polarities and a geometric offset. The apparatus includes a first double-mode surface-acoustic-wave structure comprising an electrode structure having a first quantity of fingers and a first pitch. The first double-mode surface-acoustic-wave structure has a first polarity. The apparatus also includes a second double-mode surface-acoustic-wave structure coupled to the first double-mode surface-acoustic-wave structure with a second polarity that is opposite the first polarity. The second double-mode surface-acoustic-wave structure comprises an electrode structure having a second quantity of fingers and a second pitch. The second quantity of fingers is equal to the first quantity of fingers. The second pitch differs from the first pitch by a pitch offset.
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