High-frequency front end circuit
AssigneeMurata Manufacturing Co., Ltd.
InventorHisao Hayafuji
Life of this patent
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Abstract
An antenna of a high-frequency front end circuit is connected to a duplexer and a filter. A reception-side filter of the duplexer is connected to a first reception signal output terminal. The filter is connected to the ground with a terminating resistor interposed there between. The reception-side filter is a filter which has a pass band including a frequency range of a reception signal having a first frequency band. The filter is a filter which has a pass band including a frequency range of a communication signal having a second frequency band and which has an attenuation range including the frequency range of the reception signal having the first frequency band.
Claims15
A high-frequency front end circuit comprising:
- an antenna that transmits and receives communication signals having multiple frequency ranges;
- a first filter that has a pass band including a frequency range of a reception signal having a first frequency band, one end of the first filter being connected to the antenna, the other end of the first filter being connected to a reception signal output terminal;
- and
- a second filter that has a pass band including a frequency range of a communication signal having a second frequency band which is different from the first frequency band and which is used for communication in a frequency range that is close to the frequency range of the first frequency band, one end of the second filter being connected to the antenna, the other end of the second filter being terminated.
The high-frequency front end circuit according to claim 1,
- wherein the first filter is configured as part of a duplexer.
Dependencies are inferred from the claim text.