Duplexer
Number of patents in Portfolio can not be more than 2000
United States of America
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May 3, 2022
Grant Date -
Aug 6, 2020
app pub date -
Apr 22, 2020
filing date -
Apr 22, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
A duplexer includes elastic wave resonators disposed on a piezoelectric substrate to define a ladder elastic wave filter including shunt-arm resonators and series-arm resonators. The duplexer includes an inductance component connected between an antenna terminal and a ground potential. A transmitting filter includes the ladder elastic wave filter. The inductance component is disposed outside a short side of the piezoelectric substrate such that the electromagnetic coupling between the shunt-arm resonator located closest to a transmitting terminal in the ladder circuit configuration, and the inductance component is stronger than the electromagnetic coupling between the inductance component and the remaining shunt-arm resonators.
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