Multiplexer, high-frequency front-end circuit, and communication apparatus
AssigneeMurata Manufacturing Co., Ltd.
InventorSyunsuke Kido
Life of this patent
Estimating the term…
Abstract
A multiplexer includes a first filter on a first path connecting a common terminal and a first terminal and defined by a band pass filter, a low pass filter, or a high pass filter, and a second resonator on a second path connecting the common terminal and a second terminal and defined by a band elimination filter including at least one elastic wave resonator. A pass band of the first filter and an attenuation band of the second filter overlap with each other, and a ripple of a first resonator closest to the common terminal is generated only outside pass bands of the first filter and the second filter.
Claims18
A multiplexer comprising:
- a first filter that is provided on a first path connecting a common terminal and a first terminal and is any one of a band pass filter, a low pass filter, and a high pass filter;
- and
- a second filter that is provided on a second path connecting the common terminal and a second terminal and is a band elimination filter including at least one elastic wave resonator;
- wherein
- a pass band of the first filter and an attenuation band of the second filter overlap with each other;
- and
- a ripple of a first resonator located at a position closest to the common terminal among the at least one elastic wave resonator is generated only outside pass bands of the first filter and the second filter.
A multiplexer comprising:
- a first filter that is provided on a first path connecting a common terminal and a first terminal and is any one of a band pass filter, a low pass filter, and a high pass filter;
- and
- a second filter that is provided on a second path connecting the common terminal and a second terminal and is a band elimination filter including a plurality of elastic wave resonators including a first resonator and a second resonator;
- wherein
- a pass band of the first filter and an attenuation band of the second filter overlap with each other;
- the first resonator of the plurality of elastic wave resonators is located at a position closest to the common terminal;
- and
- the first resonator generates no ripple in pass bands of the first filter and the second filter.
Dependencies are inferred from the claim text.