Radio-frequency module and communication device
AssigneeMurata Manufacturing Co., Ltd.
InventorHiroyuki Kani
Life of this patent
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Abstract
A radio-frequency module includes a first switch, a first filter, second filters, a power amplifier, and a low-noise amplifier. The first switch has a first terminal, a second terminal, and a third terminal. The first terminal is coupled to an antenna terminal. The first filter is coupled to the second terminal. The second filters are coupled to the third terminal. The first filter includes a common filter circuit and an additional filter circuit. The additional filter circuit is coupled between the power amplifier and the common filter circuit. The low-noise amplifier is coupled to a path that branches off from a path connecting between the common filter circuit and the additional filter circuit. The common filter circuit is coupled between the additional filter circuit and the first switch.
Claims20
A radio-frequency module for simultaneously performing first communication using a first communication band and second communication using a second communication band, the radio-frequency module comprising:
- a first switch having a first terminal that is coupled to an antenna terminal, and a second terminal and a third terminal that are configured to be connected to or disconnected from the first terminal in a switchable manner;
- a first filter coupled to the second terminal, the first filter having a pass band that includes the first communication band;
- a second filter coupled to the third terminal, the second filter having a pass band that includes the second communication band;
- a power amplifier;
- and
- a low-noise amplifier, wherein
- the first filter includes
- a common filter circuit configured to both transmit and receive, the common filter circuit being configured to pass a transmit signal and a receive signal in time division duplex, and
- an additional filter circuit configured to either transmit or receive,
- the additional filter circuit is coupled between a first amplifier and the common filter circuit, and the first amplifier is one of the power amplifier and the low-noise amplifier,
- a second amplifier is another of the power amplifier and the low-noise amplifier, and the second amplifier is coupled to a second signal path that branches off from a first signal path connecting between the common filter circuit and the additional filter circuit, and
- the common filter circuit is coupled between the additional filter circuit and the first switch.
Dependencies are inferred from the claim text.