Multiplexer, high-frequency front-end circuit, and communication device
AssigneeMurata Manufacturing Co., Ltd.
InventorToshishige Koreeda
Life of this patent
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Abstract
A multiplexer includes a first filter that is a ladder elastic wave filter including series-arm resonators and parallel-arm resonators, a second filter connected to the first filter at a common connection point, and a board including an inductor pattern defining an inductor connected in parallel with the series-arm resonator, and a ground pattern provided in the layer in which the inductor pattern is provided, so as to be disposed at a distance from and adjacent to the inductor pattern. A minimum distance between the inductor pattern and the ground pattern is not greater than about 1.55 times a minimum pattern width in the ground pattern.
Claims20
A multiplexer comprising:
- a first filter that is a ladder elastic wave filter including a series-arm resonator and a parallel-arm resonator;
- a second filter connected to the first filter at a common connection point;
- and
- a board including an inductor pattern defining an inductor connected in parallel with the series-arm resonator, and a ground pattern provided in a same layer in which the inductor pattern is provided, so as to be disposed at a distance from and adjacent to the inductor pattern;
- wherein
- a minimum distance between the inductor pattern and the ground pattern is not greater than about 1.55 times a minimum pattern width in the ground pattern.
Dependencies are inferred from the claim text.